Wiring Disaster and bad pin 31 ECU ground

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Originally Posted by Rich

Can somebody confirm the wire pair in the photo is the OE wiring pair that would've hooked up to the lamp in the 3-spd shifter?

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yes it is!

Quote:

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Originally Posted by Rich

Can somebody confirm the wire pair in the photo is the OE wiring pair that would've hooked up to the lamp in the 3-spd shifter?

From the wiring diagram there's a Light Green/White wire and a ground wire to that lamp, something your 5-spd D doesn't need or have. If the ID is confirmed this is factory wiring, not PO mayhem.

For any new owner dealing with PO hacks order a poster-size color wiring diagram to save yourself headaches and eyestrain. Also useful for troubleshooting at connections.

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Originally Posted by BABIS

yes it is!

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Thanks guys, just after I posted this I was staring at the schematic and I found the light you're referring to... I'm still in disbelief that this was acceptable wiring practice in the 80s. :) Thanks for the help.

Attachment 44818

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Originally Posted by spikeygg

Thanks guys, just after I posted this I was staring at the schematic and I found the light you're referring to... I'm still in disbelief that this was acceptable wiring practice in the 80s. :) Thanks for the help.

Attachment 44818

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Here's a photo of the light bulb from an automatic: http://dmctalk.org/showthread.php?10...l=1#post165448

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Originally Posted by spikeygg

Thanks guys, just after I posted this I was staring at the schematic and I found the light you're referring to... I'm still in disbelief that this was acceptable wiring practice in the 80s. :)

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Doing it that way simplified production. The factory didn't need to keep track of and buy more than one harness style at a time. Cars are still made this way...sometimes there are seat-motor-control or seat-heat connectors under front seats that are manual-adjust or aren't heated.

The transmission selector lamp wire isn't the only unused circuit in your car. I can think of at least 2 others.

The bottom line: When you find more color-coded wiring it's probably factory, not a PO hack.