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Thread: Will the ground stop working if the chasis is too hot?

  1. #1
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    Will the ground stop working if the chasis is too hot?

    I have recently noticed that my amp will not turn on with my car sometimes. This only happens when my car has been sitting in a hot place for a period of time. At first I thought that the amp was getting too hot, so I installed a fan. Yesterday, however, I figured out that there is no current going through the positive line and the ground. I tested this with a small light. I woud assume that since my car started, power is still pulling from the battery. So, the only problem would be the ground. So does the ground stop working if the place I grounded to the chasis gets too hot? Is there a way to prevent this?

  2. #2
    Well, He asked for it. WebDog's Avatar
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    hahaha...

    It sounds like you have a bad ground or power connector...

    The heat should not effect the conection..
    1990 Jeep Cherokee
    2000 VW Golf TDI 4dr
    2005 VW GTI MKIV - SOLD

  3. #3
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    Well I have confirmed that it is not power connector. I just couldn't figure out why the ground would be bad on hot days.

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    did yu mount yure amp ground to the the chassis of yur pc?? if yu did....i would think it would be better to ground it to the vehicle. also check the ground cable at yure battery for corrosion at the chassis connection. i like to add a short 4 ga ground from the battery to the vehicle body......it really helps.

  5. #5
    Constant Bitrate stapan's Avatar
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    Well I have confirmed that it is not power connector. I just couldn't figure out why the ground would be bad on hot days.
    yes, resistance of a conductor will go up as it gets hotter

    improve your ground.

    most important (more than the wire) is the connection itself. make sure it is completely bare metal of the car, no paint. (you can use a dremel type tool to grind the paint off the spot if needed). grind off enough so that the whole surface of the ring terminal touches bare metal if possible. the best place would be the floor pan. some parts of the vehicle body are just poor ground spots, whats it attached to? also make sure you are using at least 8 gauge wire, preferably 4 gauge.

    if this doesnt fix the problem. the only other things I can think of is the amp turn on lead or a defective amp.

  6. #6
    Well, He asked for it. WebDog's Avatar
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    Quote Originally Posted by sharpy39
    did yu mount yure amp ground to the the chassis of yur pc?? if yu did....i would think it would be better to ground it to the vehicle. also check the ground cable at yure battery for corrosion at the chassis connection. i like to add a short 4 ga ground from the battery to the vehicle body......it really helps.
    Thats link is from the new stupid auto links, i think he meant the car chassis...
    1990 Jeep Cherokee
    2000 VW Golf TDI 4dr
    2005 VW GTI MKIV - SOLD

  7. #7
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    there is n f way that the ambient teperature can change the ground from being "good" to being "bad" not possible/no way...... it must be a bad connection to begin with...

  8. #8
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    My ground is an 8 gauge wire to the rear wheel well. I thought that I cleaned the area pretty good, but another sanding wouldn't hurt.

  9. #9
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    I remember reading somewhere, a way to measure your ground using a multi-meter. I came up with no result through a search. Does anyone know how to do this, I am thinking that I should just find a new ground for my problem.

  10. #10
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    I recently redid my whole stereo. After the install my amp went in to protect. I checked every thing over and over. I even took back everything and had it tested. The result. My neg on my batt. It wasn't fully connected. I could start my car fine everything worked, so I never even checked it.

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