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Yep...Same problem as me.
Posted by Jeff Cunningham (more from Jeff Cunningham) on Wed, 20 Nov 2002 09:08:59
In Reply to: also of note...., kooch, Tue, 19 Nov 2002 22:07:39
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The voltage drop from the battery power line to the fuse box could be causing the lower voltage. It could also be the grounding point of the battery.
When you are looking at 11.8 volts at the gauge, hook up a voltmeter to the battery, it will probably be at 13 volts! The lines are eating up 1.2 volts just by the resistance of the cables!
You might want to read my post in General BB about electricity. Ari and others give some great insight into this problem.
I'm going to try some heavier wire in my car which I'm hoping will solve the problem. Currently there is a 4-gauge wire going to the alternator, and an 8 gauge going from the battery to the fuse box.
I'm moving to a 4 gauge wire from the battery to the fuse box. This is where the lights and fans are getting their juice from so there is a lot of current going through that wire.
The ground is also worth taking a look at. I have had many problems trying to find a good ground in the rear of the car. Maybe it's rust in some key places, I don't know. I decided to run a 4-gauge ground wire from the battery to the front of the car, but I believe this is also to small of a wire. I'm also changing this one to a 0/1 gauge wire to drop the resistance down there too.
Good luck!
posted by 168.159....
Jeff & Royce's SAAB Extravaganza
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