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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

‘91 Chevy Blazer S-10, Electrical Problem
Q: I own a ‘91 S-10 blazer, and have trouble with my battery gauge, everytime I put my turn signal, light's, horn, or reverse lights on, the gauge fluctuates. I think I have a bad ground, but I'm not sure. I also have engine static when I turn on my radio. If you have the time I could use your advice, thank you!

A: The power supply and ground for the voltmeter on your vehicle is shared with other gauges such as temperature, oil and fuel. If there was a wiring problem, the operation of the other gauges would likely be affected too. It may be that your voltmeter is showing some electrical aging and overreacting. As for the radio, if the noise is only present when the engine is running then disconnect electrical components that are active when the engine is running. Items such as the alternator, various solenoids and relays may be temporarily disconnected with the engine running while listening for a change in the static heard on the radio. Of course there are ignition components that you cannot disconnect and still have the engine run. But this approach helps determine what is not the cause for your radio static.

 
     
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