Really Weird Electrical Problems - Ideas?

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Coomer

Copper - Posts: 103

Joined: November 29, 2002

Location: United States

Posted: April 15, 2005 at 11:38 PM / IP Logged

I tried jumping it just for kicks...nothing happens.

I found out tonight that some of the circuits in the car actually are working a little bit. When I turn the key to on, the few indicator lights come on in the cluster. Turning the key to start turns on the fans, but nothing else. Tons of circuits still don't work. I just don't know what to do. Really Weird Electrical Problems - Ideas? - Page 3 -- posted image.

Really Weird Electrical Problems - Ideas? - Page 3 -- posted image.

Coomer

Copper - Posts: 103

Joined: November 29, 2002

Location: United States

Posted: April 16, 2005 at 3:34 AM / IP Logged

So today I was testing the alternator, and it turns out that I'm only getting +4 volts when I should be getting +12 volts. The wires aren't hot and the fuses aren't blown...this is really weird.

boomer_106

Silver - Posts: 710

Joined: November 25, 2003

Location: United States

Posted: April 16, 2005 at 6:15 AM / IP Logged

How are you testing the alternator when the engine won't run? If you have an autozone in the area they will test the alternator for free. Just take it off and take it to them.

Coomer

Copper - Posts: 103

Joined: November 29, 2002

Location: United States

Posted: April 16, 2005 at 12:24 PM / IP Logged

I just tested the voltage at the large B terminal(which connects to some fuses and the battery.) So that terminal should always be at +12 volts(~14.4 if the car is on and the engine is running), not +4 volts.

boomer_106

Silver - Posts: 710

Joined: November 25, 2003

Location: United States

Posted: April 16, 2005 at 8:11 PM / IP Logged

Oh ok. Sounds like you have just basically tested the batterys' potential through the alternator post. I'm out of ideas for ya so, I'm gonna give you a link to post your problem at. There are alot of mechanics there. They may come up with some good ideas. Just register and post your question in the appropriate forum.

http://www.batauto.com/cgi-bin/Forum/db_TalkToMeV2.cgi

joebobcletusjr

Copper - Posts: 72

Joined: January 21, 2005

Location: United States

Posted: April 22, 2005 at 2:24 PM / IP Logged

Any updates on this one? I am kind of curious as to what the issue is.

There has been a lot of speculation, but no sign of a resolution.

eh? what did you just say?

Search for other posts by joebobcletusjr

overworked2

Copper - Posts: 132

Joined: March 10, 2005

Location: United States

Posted: April 23, 2005 at 9:20 PM / IP Logged

erm.....I would almost start looking at ECU...don't know how it would've happened but it may have.

As a suggestion (and only a suggestion) you can try removing the entire loom from the ECU, leave it off for about 30 seconds, then plug it back in, then remove the (+) battery cable for 30 seconds then plug it back in and see what happens. Effectively this resets the computer and returns it back to default, if this was the problem then it should start the car.

Check all advice given with a meter

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: April 24, 2005 at 11:09 AM / IP Logged

You get 12 volts at the battery and 4 volts at the alternator + terminal? Check your fusable link.

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Zen

Member - Posts: 3

Joined: October 21, 2004

Location: Alberta, Canada

Posted: April 26, 2005 at 6:19 PM / IP Logged

Sounds like if you have your batter in the trunk your problem is in your positive wiring from the battery to the original positive wiring on the car. You should have a full 12 volts on everything connected to the battery, including the large B terminal on the alternator. It sounds like all you have to do is find the bad connection in between.

Zen

Member - Posts: 3

Joined: October 21, 2004

Location: Alberta, Canada

Posted: April 26, 2005 at 6:20 PM / IP Logged

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