Any interest in a comprehensive wiring harness clean up and install thread?

[nitrofarm]

I checked, the IAT is integrated into the MAF.

Thx for checking thats what I was thinking.Seems like most are this way except our Aspire's.

Sadly, AutoCAD 2010, which is a labor of love [read:tedious]. There's a dozen better programs for this, but none on my PC at work.

Bernie my son is in Engineering and he was just telling me how cumbersome AutoCad is. Your schematic l;looks great though! Here is what I just did to my Aspire,was able to reuse all the wires without having to pull ANY through the firewall.I drew this up at work just like your self except I only get to use the playschool "PAINT" software drool ASPIRE SWAP

[DON SVO]

BernieM pulled the Kia harness apart last night to get an idea of what we were keeping and what was going. I'll allow him to elaborate later. It looks pretty simple thus far.

[BernieM]

Bernie my son is in Engineering and he was just telling me how cumbersome AutoCad is. Your schematic l;looks great though! Here is what I just did to my Aspire,was able to reuse all the wires without having to pull ANY through the firewall.I drew this up at work just like your self except I only get to use the playschool "PAINT" software drool ASPIRE SWAP

I have limited experience with AutoCAD; mostly making adjustments to clients' drawings. I can't say I'm a huge fan of it, but I've never really dug into their 3D stuff like I have with parametric software like CATIA and Pro/E. I think AutoCAD is cumbersome on the front end, but it's really easy to translate a model to paper. I love modeling in Pro/E, but laying parts and assemblies out on paper is wonky!

Anyway, thank you. Paint works fine too when that's what you have to work with and that looks clear enough to follow. I've even used Microsoft Word to lay out schematics because it has a grid feature that you can snap lines to, and it's all I had to work with at the moment.




Regarding the harness on Don's build, it came out of an ATX car and going into a MTX. I cut the existing firewall grommet off the harness and exposed the wires that we'll be cutting and pinning. I don't much care for gooey wires, so I think it's getting an alcohol bath, too.

Some of that goes away. We'll try to detail the particulars as we go along.

[jawbraeka]

Actually a "Schematic" or "Wiring" thread would be a good place to start. I've often wondered why we dont have an "Electrical" thread. And then broken down into Chassis & Engine.

i 2nd this notion.

[jawbraeka]

i have a question.. i'm planning of doing a capri swap into a 1991 festiva. i'm going from a b3 (carby) to a b6 (EFI) and pondered over a few ideas, and seeing you know a lot about this, i think i'll ask you.

is there the possibility to remove the original b3 harness for the ignition and directly solder into the barrel the capri loom?

is it easy enough to wire the capri loom for accessories (A/C, Power steering, etc) or is that stretching the build a little further than it needs to be as i'd just love to simply use the one harness to run everything instead of splicing everything.

I don't have power steering but plan to have it later, is there a way to "hide" that part of the loom for later use as i'd hate having to regraft an essential part of the loom if needed.

I won't be running a turbo, but possibly later i will, so as far as i understand i can keep my A/C, is there a way to utilise the capri Loom for the A/C to keep running it?

[jawbraeka]

this may have been mentioned already but something like this would be really ideal

http://i30.photobucket.com/albums/c328/Overburn12/Wiring/WiringConversionSmall.jpg

http://i30.photobucket.com/albums/c328/Overburn12/Wiring/ECUPINOUT.jpg

is there a chance that a "Ready-to-go" loom with that bulkhead connector could be made up (for a price) at all?

[DON SVO]

i have a question.. i'm planning of doing a capri swap into a 1991 festiva. i'm going from a b3 (carby) to a b6 (EFI) and pondered over a few ideas, and seeing you know a lot about this, i think i'll ask you.

is there the possibility to remove the original b3 harness for the ignition and directly solder into the barrel the capri loom?

is it easy enough to wire the capri loom for accessories (A/C, Power steering, etc) or is that stretching the build a little further than it needs to be as i'd just love to simply use the one harness to run everything instead of splicing everything.

I don't have power steering but plan to have it later, is there a way to "hide" that part of the loom for later use as i'd hate having to regraft an essential part of the loom if needed.

I won't be running a turbo, but possibly later i will, so as far as i understand i can keep my A/C, is there a way to utilise the capri Loom for the A/C to keep running it?

this may have been mentioned already but something like this would be really ideal

http://i30.photobucket.com/albums/c328/Overburn12/Wiring/WiringConversionSmall.jpg

http://i30.photobucket.com/albums/c328/Overburn12/Wiring/ECUPINOUT.jpg

is there a chance that a "Ready-to-go" loom with that bulkhead connector could be made up (for a price) at all?

What I would personally do is install the EFI festy harness with the LADD connector. The reason I would do it this way is because the B6 (easily) installs with factory electronics. The benefit of a B6 swap IS simplicity... However when you go from carb to EFI it'll always pose a hitch. EFI tank and wiring (easy to do if using EFI harness, just get the wiring from the PCM to pump) are needed, of you splice in an inline fuel pump. I prefer EFI tank/wiring.

I could build harnesses for the guys who want the carb/EFI swap. No problem. I don't recommend the LADD connectors unless you're serious about your car. I paid $90 for the connectors and pins. BUT, the install tools are loaners from LADD and cost $700. If someone was dead serious about doing a harness with the bulkhead connectors I'd say call LADD, have them ship me the connectors and pins and ship the buyer the tool. I would obviously want money up front for it.

I could do a junkyard harness configured to any swap, thdn set up for LADD connectors for $350. This is me hunting a harness, cutting, splicing and making it 100% thread-into-your-bulkhead.

[jawbraeka]

What if I sent you my harnesses via registered mail (with insurance obviously) and you could splice them and write instructions on how to install the looms? It looks simple enough, but instructions wouldn't hurt? Would there be a slight discount for that?

[moz]

Re: Any interest in a comprehensive wiring harness clean up and install thread?

Don.

Could you clarify something for me?

The b6t ecu. When installed into a carb festiva.
You would obviously have to install the entire wiring harness (with the exception of lights, AC, and accessories).
Would we still need to splice cables to any part of the old harness outside of ignition and power supply?

When removing the harness from my Capri, I noticed that part of the harness does head in the direction of the instrument cluster.
Does the ecu interface with the cluster at all?

I'm getting closer to the moment where I'll need to strip out the 121 and want to cut out anything I don't need with optimum confidence

I'm trying real hard to not sound like a noob :p

I've got experience but none with turbo and ecu conversions. Even though I'm very confident with wiring and electronics.

Thanks for your time

Moz

[jawbraeka]

Moz, I would pull the cluster and simply investigate it.. possibly it might be power for the lights of the cluster when its dark, don't quote me on that. Also, it may have something to do with the boost for the turbo. If it were me, id get into the guts and use a multimeter to determine if it is the lights for the dashboard. Maybe trace the loom manually to the fusebox. Also, if you have the manual, have a bit of a read and see if it will tell you if there's something connected to the cluster.If you happen to work it out, please report back too.

[moz]

GAZ,
any interfacing between the ecu and cluster would be for diagnostic or display purposes.
Lights and other accesories run off a different harnesses straight to the fuse box.
As you will soon see. There are 4 separate plugs on the back of the capri cluster. I think one or two go back to the ecu, the others go to the fuse box.


Im trying to establish whether the ecu gets values from the cluster or whether the ecu just supplies the cluster with info for the boost, fuel, and temp gauges to display their respective levels.
if its the former... we're in for an interesting ride. (and ill probably go with aftermarket stand alone ecu)
If its the latter, you can just not connect it and it will be fine, and you could leave the gauges reading their analog signals (maybe)

Thats why im asking don (who has a tonne of experience) to confirm the purpose of this interface.

Im inclined to fit an inline or even submersible (if space allows it) pump to the carb fuel tank, and upgrade the main fuel supply line to 3/8".
The fuel pump power supply goes straight to the fuse box so I would assume that it doesnt communicate with the ecu.
Im still trying to figure out if the fuel gauge gets its value from the ecu or direct from the level sensor in the tank. The level sensor also goes to the same plug that goes to the fuse box so im a little puzzled.


Sorry if this post reads a bit erratic. I wrote this one over 45 minutes with approx 20 interruptions.

[DON SVO]

What if I sent you my harnesses via registered mail (with insurance obviously) and you could splice them and write instructions on how to install the looms? It looks simple enough, but instructions wouldn't hurt? Would there be a slight discount for that?

Well if I don't have to go find a Festy or an aspire to hack up (or a KIA, which I prefer), of course. I will test the harness prior to do any work and let the buyer know if it needs any connectors (old brittle connectors like to break) and send them a drop-in piece.

These pics are from my buddies' NASTY 331/72mm street car... Same exact connectors:





This is a loaner from Deutsch. New in the box will cost you $700 for the tool and their crimper, but the loaner is free as long as you only have it for 30 days.

Don.

Could you clarify something for me?

The b6t ecu. When installed into a carb festiva.
You would obviously have to install the entire wiring harness (with the exception of lights, AC, and accessories).
Would we still need to splice cables to any part of the old harness outside of ignition and power supply?

When removing the harness from my Capri, I noticed that part of the harness does head in the direction of the instrument cluster.
Does the ecu interface with the cluster at all?

I'm getting closer to the moment where I'll need to strip out the 121 and want to cut out anything I don't need with optimum confidence

I'm trying real hard to not sound like a noob :p

I've got experience but none with turbo and ecu conversions. Even though I'm very confident with wiring and electronics.

Thanks for your time

Moz

It would depend on how involved you want the PCM to be with the cluster. It obviously would feed the CEL but that's signal and ground (2 wires) but everything about the cluster is an input from either the PCM or a sensor.

My cluster will have only one stock(ish) gauge: fuel level. Everything else is aftermarket.

Moz, I would pull the cluster and simply investigate it.. possibly it might be power for the lights of the cluster when its dark, don't quote me on that. Also, it may have something to do with the boost for the turbo. If it were me, id get into the guts and use a multimeter to determine if it is the lights for the dashboard. Maybe trace the loom manually to the fusebox. Also, if you have the manual, have a bit of a read and see if it will tell you if there's something connected to the cluster.If you happen to work it out, please report back too.

There's a festiva instrument cluster wiring diagram on this site. If anyone wants help reading the diagrams let me know. I'll walk them through it.

GAZ,
any interfacing between the ecu and cluster would be for diagnostic or display purposes.
Lights and other accesories run off a different harnesses straight to the fuse box.
As you will soon see. There are 4 separate plugs on the back of the capri cluster. I think one or two go back to the ecu, the others go to the fuse box.


Im trying to establish whether the ecu gets values from the cluster or whether the ecu just supplies the cluster with info for the boost, fuel, and temp gauges to display their respective levels.
if its the former... we're in for an interesting ride. (and ill probably go with aftermarket stand alone ecu)
If its the latter, you can just not connect it and it will be fine, and you could leave the gauges reading their analog signals (maybe)

Thats why im asking don (who has a tonne of experience) to confirm the purpose of this interface.

AFAIK, Capri clusters are an output device. PATS (passive anti-theft system) cars need the cluster for certain.

Im inclined to fit an inline or even submersible (if space allows it) pump to the carb fuel tank, and upgrade the main fuel supply line to 3/8".

Get a walbro inline EFI pump. You can splice it in right after the fuel filter in the engine bay. Easy.

The fuel pump power supply goes straight to the fuse box so I would assume that it doesnt communicate with the ecu.

It will once you go EFI. The PCM controls pump output.

Im still trying to figure out if the fuel gauge gets its value from the ecu or direct from the level sensor in the tank. The level sensor also goes to the same plug that goes to the fuse box so im a little puzzled.
Sorry if this post reads a bit erratic. I wrote this one over 45 minutes with approx 20 interruptions.

It gets it from the sender.

[moz]

Re: Any interest in a comprehensive wiring harness clean up and install thread?

It would depend on how involved you want the PCM to be with the cluster. It obviously would feed the CEL but that's signal and ground (2 wires) but everything about the cluster is an input from either the PCM or a sensor.

The cel will be one of the few things I'll splice in. But that's no biggie.

There's a festiva instrument cluster wiring diagram on this site. If anyone wants help reading the diagrams let me know. I'll walk them through it.

I shall look for it. Please share the link if you have it handy. Do you know whether the efi and carb cars shared the same clusters?
If they're the same, then I should be able to follow most of the splicing instructions already offered on this site.

AFAIK, Capri clusters are an output device. PATS (passive anti-theft system) cars need the cluster for certain.

PATS was introduced by Ford in 96. Capri production ended in 94. So I should be in the clear there.

Get a walbro inline EFI pump. You can splice it in right after the fuel filter in the engine bay. Easy.

Would I still need to upgrade the fuel line? The 121 currently has a 5/16" feed from the tank. Not concerned about the return tube as all it would do is increase the pressure at the rail (which is probably a good thing)

It will once you go EFI. The PCM controls pump output.

Got ya. I'll trace the fuel pump cables more carefully to see where it ends up.

[jawbraeka]

Moz, just to clarify, we got the easier of the two paths didn't we?

[Huli]

Re: Any interest in a comprehensive wiring harness clean up and install thread?

You should only need to replace the fuel line between pump and fuel rail.

unless you find the filter to pump section collapsing under suction