1991 E40D no first gear...

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Dec 18, 2019 | 10:37 AM

#31

Dan Niksich

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Just cleaned the ecm up to take it in for the right resisters and found this now. Guess I should just get a new one.

Dec 18, 2019 | 12:38 PM

#32

Paul 92 f350

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It wouldnt cost much to try. I have watched some videos but elected not to as I'm better suited for repairing things with a BFG and crow bar!

Dec 28, 2019 | 07:29 PM

#33

Dan Niksich

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Well, as as my luck usually goes, I replaced the 2 resisters and 3 capacitors and I'm still getting code 91 and then 11 so I guess there was more to it so I tried jumping the #1 solenoid at the ecm harness with the relay jumped and sure enough, no click. Checked continuity and there's nothing so there must be a break/short in the wire somewhere. Only thing I can think to do would be to replace the entire wire from the ecm to the solenoid pack connector. Hopefully this finally fixes it....maybe?? Wish me luck.

Dec 28, 2019 | 10:44 PM

#34

Paul 92 f350

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With the relay jumped you should get about 6v to ground on solenoid 1 pin. (Or a dim lit test light. If you run a ground wire down underneath you should faintly here it click. It will take a second to reset. Is that how you did it? It doesnt take long to pull the harness after the 3rd or 4th time.

Dec 28, 2019 | 11:10 PM

#35

Dan Niksich

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Found the other problem! I just happened to find this while checking the harness under the truck.

Dec 28, 2019 | 11:14 PM

#36

Dan Niksich

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Cut about a foot out since the wires were corroded under the insulation and patched em and now I have 1st gear! What a major PITA this was to figure out. Bad plug, Bad ECM and bad wires.

Dec 28, 2019 | 11:19 PM

#37

Dan Niksich

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Quote:

Originally Posted by Paul 92 f350

I jumped the relay and ran a ground wire touched pin 52 on the ECM plug and didn't hear anything. Tried pin 19-(2nd gear) and heard a click so I figured it was a wire. Luckily I found the bad spot right away.

Dec 28, 2019 | 11:55 PM

#38

Paul 92 f350

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My harness look like that but not as bad. Probably what frys the pcm. Glad you figured it out.

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Dec 29, 2019 | 12:07 AM

#39

Dan Niksich

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Me too. Thanks for the help. Glad I was able to swap the resisters/capacitors myself. Definitely saved some money.

Dec 29, 2019 | 02:13 AM

#40

Paul 92 f350

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Yea. I thought about trying that but chickened out. I still have it so I still might for a spare. I never have been to good at soldering though.

Dec 29, 2019 | 06:38 AM

#41

FORDF250HDXLT

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From: Mi'kma'ki

Quote:

Originally Posted by Dan Niksich

Found the other problem! I just happened to find this while checking the harness under the truck.

Dang, Dan. Where was that? Rubbing on the frame?

Dec 29, 2019 | 08:48 AM

#42

Dan Niksich

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Quote:

Originally Posted by FORDF250HDXLT

Dang, Dan. Where was that? Rubbing on the frame?

Yep, on a frame bolt actually. Went through the loom also. Needless to say, I made sure it's not rubbing on that bolt anymore.

Dec 29, 2019 | 08:52 AM

#43

Dan Niksich

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Quote:

Originally Posted by Paul 92 f350

Yea. I thought about trying that but chickened out. I still have it so I still might for a spare. I never have been to good at soldering though.

It actually wasn't hard at all. The solder points were spaced out pretty good. If you happen to need the same resisters/capacitors I changed, let me know and I can throw some in an envelope and send em to you.