ST165 voltage problem

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ST165 voltage problem

Postby Lopata29 » Mon Oct 03, 2016 8:33 pm

Hello everyone, I just picked up an 88 st165 and I'm having trouble keeping it running for more than a mile. I was driving it home and the alternator died. I just replaced it this morning, and its still dying a few minutes after I jumpstart it.

I haven't had a chance to check the wiring with a multimeter yet, so does anybody have suggestions where to start?

I also know that there is a short somewhere in the dash because a previous owner tried to put a stereo in and screwed it up, however I have an OEM uncut dash harness that I'm going to put in asap.
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Re: ST165 voltage problem

Postby ___Scott___ » Tue Oct 04, 2016 2:20 am

A battery that won't take a charge will cause problems like that.
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Re: ST165 voltage problem

Postby Lopata29 » Tue Oct 04, 2016 1:20 pm

I found at least one of the problems, there's a wire that's nearly chewed through, and a fuse that, while it still works, is missing the clear plastic cap.

Are there common problems with the wiring around the alternator/turbo?
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Re: ST165 voltage problem

Postby 88gt4DE » Tue Oct 04, 2016 9:28 pm

The big three wire plug on top of the alternator. The wires get brittle and break inside the insulation due to heat. This happened to my brothers 165. Check the wiring on the harness side and Alternator side if you didn't get a new extention harness with the alternator.
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Re: ST165 voltage problem

Postby underscore » Wed Oct 05, 2016 4:45 pm

Check the main fuse between the alt and battery, it's held in with screws from the bottom so don't try to yank it out.
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Re: ST165 voltage problem

Postby Lopata29 » Wed Oct 05, 2016 7:00 pm

Excellent, thanks for the tips! I'm going to try to replace the screwed up bits of the dash harness so I'll add those to my list for saturday.
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