Electrical Problem

[nitrofarm]

Man I'm confused I thought you said the last time it cranked and had spark. Maybe your ICM has failed. Check for voltage like Brave said at coil input.If no power work backwards towards ICM & hopefully thats all that failed.

[nitrofarm]

He already said he can hear the Fuel pump running thats the main relay working correct?

[bravekozak]

Maybe the check engine and parking brake bulbs are burned out.
Before we undo the speedometer cable, remove the cluster bezel and pull the instrument cluster out to check, we must check for spark.

[bravekozak]

When you turn the key, check to see if you get power to the BK/W wire on the positive terminal of the ignition coil.

[jbrown]

Nope there is not any spark. However the fuel pump is kicking on. If I don't have spark nor that check engine light on on showing that the ECA is communicating, and it is getting power isn't it the ECA, I just don't understand how it fried before the 10A ROOM fuse.

[bravekozak]

Help him out guys. He says he has spark. How can we prove the injectors are squirting gas? and the ECA is doing its job? without an ECA tester. Otherwise his engine should start.

[jbrown]

Yeah all the wires on the relay are hot.

[bravekozak]

Main relay is down low behind the R/H headlight. Look for the Yellow/Black wire. The test light should come on when you crank the the engine.

[jbrown]

No I don't think that happened nothing is cut or rubbed that I can see.

[defprun]

The only time I had an issue with these fuses was when my main harness under the rad support shifted and the rad support cut into the harness.

[jbrown]

It was a ten amp and it didn't go which makes it hard for me to believe the ECU fried. How would I go about checking the EGI circuit? It is good out of the fusible link box. But I am not sure where to check past that.

[bravekozak]

I sure hope your ROOM fuse was a 10 AMP (red) fuse and protected your ECA when the MAIN fuse link melted.

The injectors get their power from the EGI fuse link through the main relay (Y/BK). They ground through the ECA (GN/Y & GN/BK). That's how they know when to turn on and shut off. Check out that circuit.

I am only assuming that your main relay should work because your fuel pump relay is working.

[nitrofarm]

Yes just went out with my test light MAIN link is hot and ROOM is also hot.

Sounds like the ECM may be toast then,like Brave said it supplies check engine light with key in Run
http://www.fordfestiva.com/forums/sh...iring-diagrams post# 3

[jbrown]

Yes just went out with my test light MAIN link is hot and ROOM is also hot.

[bravekozak]

jbrown, what you need is a cheap 12V test probe. Then you can tell, what's hot and what's not.
Is your ROOM fuse OK?