Electrical issues, High idle, stalls when brake is applied. (Page 4/4)
sanderson231 JAN 12, 11:35 PM

quote
Originally posted by Patrick:

Since you've now got the motors disconnected, I suspect that putting a test light into the circuit (at the disconnected plugs) would tell you which motor is drawing power (when it shouldn't be).



Yes start with a test light. If there is big current drain you will blow the fuses in a multimeter when used in amp mode.

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formerly known as sanderson
1984 Quad 4
1886 SE 2.8L
1988 4.9L Cadillac
1988 3800 Supercharged

Zach85GT JAN 27, 09:43 PM
Sorry for the big gap between replies, But I am currently working on getting the alternator out, its been a big PITA as expected. Okay maybe a bit more of a PITA than I thought. I broke the top alternator pivot bolt, even after being super cautious, I used PB blaster, heated the bracket casing with a torch, and wiggled the bolt back and forth before applying big leverage one way, and it still broke right at the threads.... So that has been my project between work and class for the past week lol. I also broke a metal brake line. (I really should have disconnect those) they were super rusted anyways.... Back on topic.

The headlight are not the source of the issue, I reconnected them and still have same issue. I have a strong feeling my old SI alternator has sorted out and is drawing power from the battery.
After I get this pesky broken bolt out (which I think I'm going to drill through the alt bracket and shred the bolt, as I ordered a new one.) and get the new CS alt in there I will update everyone.
The next thing I'm going to try if this dose not resolve, is look at all the fusible links.
theogre JAN 28, 08:58 AM
Get alt Tested @ most local part stores for free.

Fusible Links Do Not drain the battery.

Again... Get DC Amp Clamp. Example: https://www.amazon.com/Uni-...itance/dp/B00O1Q2HOQ

Draining over night + using a Clamp meter should show what circuit and fast and w/o cutting wires or taking apart whatever.

That should tell if the Alt is drain the battery w/ engine off too. Or just disconnect the alt wire @ back of alt and side plug.
⚠️ Warning: Discon the battery while wrenching on alt output bolt.