Ground straps - Chevelle Tech
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post #1 of 5 (permalink) Old May 14th, 05, 12:31 PM Thread Starter
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Question Ground straps

69 Chevelle, the assembly manual shows two ground straps going from the valve covers to the fire wall, are both the straps needed? What is the need for two? I have none on right now and the car (stock) seems to run fine all lights work (dash and exterior)
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post #2 of 5 (permalink) Old May 14th, 05, 12:58 PM
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Bill
 
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Re: Ground straps

I've heard that the ground straps are for radio noise supression. You probably have a cable from battery negative to the engine. That's the electrical ground. It's also important to have a multi-point ground for the engine block to the frame. I've studied this setup and it looks like GM wanted the block grounded in more the one place to act like shield for the ignition system getting into the radio.

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post #3 of 5 (permalink) Old May 14th, 05, 6:56 PM
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Re: Ground straps

Yes the 2 braided ground straps are for radio noise interference. I think there are actually 3, or maybe that that's only if you have an FM radio which is more sensitive to electrical noise. The engine gets it's ground from the main battery negative cable. The rest of the electrical system gets it's ground from the ground wire to the passenger side front fender. They're not required unless you want the car to look 'correct' or are experiencing noise in the radio. Most modern radios have noise suppressers built in.

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post #4 of 5 (permalink) Old May 14th, 05, 8:37 PM Thread Starter
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Smile Re: Ground straps

Thanks for the info guys
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post #5 of 5 (permalink) Old May 14th, 05, 11:45 PM
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Mike
 
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Re: Ground straps

Should also be one from frame to body, right front about where passenger floor board is.
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