arthurpendragon
Aurora Watcher
The closer you get, to the Meaning; The sooner you know, that you're DREAMING.. (Black Sabbath)
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Post by arthurpendragon on Feb 14, 2019 19:12:34 GMT -6
(02 3.5)
Today I thought I would inspect and renew the ground wire from the battery to the chassis under the back seat. I did a triple take! The thing actually does not have a ground cable to the engine! All that starting current goes through the body. Wow...
I did clean the contact bolt under the negative cable. It starts better/quicker and the note of the motor actually changed! No surprise there - computerized stuff needs clean connections. You have only 12v to start with...
I hope the positive cable goes up to the starter? More or less has to...
Anyway, how does the motor get grounded? There must be a cable from the body to the motor somewhere? I cant see it...
I need to find that cable and clean the connections on both ends of it.
Any help appreciated  |
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tigger
Administrator 
Posts: 2,844 
Staff Member
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Post by tigger on Feb 15, 2019 1:12:37 GMT -6
I think the block ground runs from just behind the alternator to the frame under the fuseblock...
I think ...lol!
You could add one (or 2) if in doubt.
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arthurpendragon
Aurora Watcher
The closer you get, to the Meaning; The sooner you know, that you're DREAMING.. (Black Sabbath)
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Post by arthurpendragon on Feb 15, 2019 6:38:25 GMT -6
I think the block ground runs from just behind the alternator to the frame under the fuseblock... I think ...lol! You could add one (or 2) if in doubt.
I saw a couple threads but they seemed to be for the 1st gen. It's still awfully cold. I think I will run a ground from the strut tower to the bolt that secures the coil packs, like someone said, until I have another warm (er) day to work on it.
I know for sure ground faults will cause soooo many problems on computerized engines.
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Post by AuroraGirlFromMars on Feb 15, 2019 7:17:54 GMT -6
I remember on my 1990 Oldsmobile Delta 88 Royale Brougham (say that many times)the ignition system and engine computer all failed around the same time. It was my first car and I was 16. When replacing the components the ground cable, which runs under the coil/ignition module, had very very poor connections from the corroded aluminum bracket on the block to the rusty steel on the body, and I honestly think it caused them to go bad. Fortunately I cleaned them up, threw in a ECU from a 1988 Buick Lesabre, put new ignition module/coil, and she was good to go.
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