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1966 Mustang Coupe, 1988 5.0 HO Swap, EFI, MAF, T5z, 4 Disc Power Brakes, Painless Wiring Harness
Doing a run down of the major systems of the car to try and drive it in a few weeks. Checking all the lights:
Brake lights work
Headlights work
Fog lights work
Dome, courtesy, under dash, and glove box lights work
trunk light works
Horn Works
wipers work
Turn signals don't work
Emergency Lights don't work.
Checked the fuse...looks good.
Nothing, no faint sound no dimming nothing. They worked when I installed the harness last year. This has to be a bad ground somewhere right?
The Emergency Light switch should come on regardless right? I'm stumped.
Last edited by TremendousWand (8/17/2019 8:41 PM)
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Check the flasher elements?
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IT WAS THE DAMN BATTERY!!!!
My goodness, I've lost any hair I had left trying to diagnose the turn signal problems. I kept thinking it was a bad switch. Then I thought it must be bad flashers. When the horn stopped working I was convinced that the switch wires were wrong. Then I noticed the lights looked a little dim. Finally checked the battery and realized it was 5 years 6 months old. It was down to 9.6 volts and fully dead according to the guy at autozone.
I hooked up the battery to my truck by way of jumper cables and sure enough everything worked as it should. Turns out all my wiring was correct and it was just a dead battery. Sometimes the solution is right in front of your face. With the car being a long term restoration project, I neglected to think that the battery would fade even with a plug in battery charger. 66 months is actually pretty good for that battery.
Oh well, on to the next thing.
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You are not alone, I know I have missed some obvious things in the past.
A new battery is better than pulling the column and dash apart.
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