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Turn Signals not working/Electrical problems


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Hey y'all. Due to this pandemic I'm out of the job and have loads of time for my comanche project! Hurray!

 

I bought my 87 with a lot of electrical issues and a bad motor. While I sorted out the motor with a used 96 high output, the electrical issues are driving me nuts.

Here's my main issue:

No turn signals on either side, no illumination on the dash indicators. The hazards do work fine though. I've replaced a few parts and don't know where to go next. It has new turn signal switch (not fun) and a new turn signal fuse, as well as a new negative battery cable. I've yet to go through some of the grounds and that's what I plan on fiddling with today, but I was wondering if there is anything else I should be looking into?

 

There's also a weird thing going on where the driver side brake light is always on even when the car is completely off. In order to keep the battery healthy and the bulb from burning I have it on a battery maintainer but I'm not sure if this is pointing me to the real problem or is a different headache altogether.

 

Thanks for any help/advice!

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they aren't fuses.  they are little devices that turn on and off over and over to turn the lights on and off. :L: 

 

you may need to break out the multimeter and track down where the power stops.  hopefully one of the guys that is more versed in the connectors will stop by and chime in.  since the hazards work that should help with determining where the power goes.

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Good afternoon.   My 87 Comanche had the same issues.  I did most of the ground refresh list with no improvement.  I also removed the connector block under the hood.  No change.  Finally the forum masters found a reference to the main power switch connected to the ignition key switch.  This switch is on the steering column.  It wasn't much fun to replace and I still need to adjust the whole thing but the intended functions have been fixed.  Now my brake lights are always on unless I unplug 1 brake switch wire.  I noticed the switch was really warm.  Good luck to you.  Hope this helps.

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So after some more research I've read that a leaky MC can cause havoc on the electrical components since it's directly above the fuse box! I recently had the MC replaced but did not think about the damage all that brake fluid may have been causing for many years. This combined with a leaking windshield has done a number on it. I took apart the connection at the firewall and sure enough it's incredibly nasty! Upon closer inspection of the fuse box I noticed how loose some fuses were and it appeared there was severe corrosion and a couple connectors missing. My plan is to clean the connections and do my best to clean/ fix the fuse box. The picture I included has the state of the connector on the engine side of the firewall (left side cleaned up and right side still dirty) Not sure if this will solve my problem but it seems like a good place to start.

 

I really hope I don't have to get/rewire another fuse box

 

Thanks again everyone

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