Temperature sensor

[georgeb]

I bought an '89 wiring and vac manual on ebay a few days ago but don't know when it will arrive.

[neanderpaul]

I have the 89 but im 600 miles away ill look saturday if this is not solved by then

Is it automatic?

[neanderpaul]

I bought an '89 wiring and vac manual on ebay a few days ago but don't know when it will arrive.

Awesome!

[FB71]

Radiator Coolant Temp switch. Input to PCM, pin 1L, light green wire. Black wire at switch is ground. Switch is closed at 63*F and above. Used to indicate cold weather operation, primarily cold-start (choke-function emulation).

[FB71]

got an answer for you from Jim....it is the fan control. He does not remember if when unplugged the fan stays running or does not run at all. If it is like the one up top...I would say the fan would just always run when it is unplugged.

just to clarify... I was half asleep when Willie asked me!

[htchbck]

Radiator Coolant Temp switch. Input to PCM, pin 1L, light green wire. Black wire at switch is ground. Switch is closed at 63*F and above. Used to indicate cold weather operation, primarily cold-start (choke-function emulation).

BOOM! I was right a week ago! I knew it wasn't for the fan or temp sender because I had it unplugged on Babystiva for a while and those both worked fine. Figured it was something to do with cold start/choke

[GenevaDirt]

just to clarify... I was half asleep when Willie asked me!

lol....it was rather late for an old teacher....hehehehe

[neanderpaul]

BOOM! I was right a week ago! I knew it wasn't for the fan or temp sender because I had it unplugged on Babystiva for a while and those both worked fine. Figured it was something to do with cold start/choke

Indeed! Nice call!

[neanderpaul]

Now I have to find a sensor with the correct pitch and specs. Any suggestions?

[htchbck]

I know you've been through several different rads looking for the right one, but I promise the AZ one is a direct fit. I've used them on two carb'd cars with that bottom switch, and on both the switch screwed on perfectly after removing the plastic plug. One of them is in Babystive right now actually. Barring that, maybe you can find a switch that is smaller and closes around 63ish degrees. Then drill and tap the current plastic plug to accept it? Might have to switch the terminals on the wires to fit the new switch as well. Or just short the wires together and then stop driving the car after it starts getting cold outside? :lol: As long as the wires are shorted together it shouldn't affect anything till fall temps get here, so you have a little time to sort it out at least

[nitrofarm]

Radiator Coolant Temp switch. Input to PCM, pin 1L, light green wire. Black wire at switch is ground. Switch is closed at 63*F and above. Used to indicate cold weather operation, primarily cold-start (choke-function emulation).

And its unique to 89 Auto's?

[FB71]

should be the same as the carbed cars.

[htchbck]

Yes, same as carb'd.

[georgeb]

I got that '89 wiring/vac manual today if the prob hasn't been resolved.

[eurotiva]

Paul works for advance auto, so buying an auto zone rad might be sac-religious