Why would overheating occur with high electrical loads? - Defender Source
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Old May 10th, 2009, 10:03 PM
johnpiero
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Why would overheating occur with high electrical loads?

I've had the weirdest problem happen a handful of times already but i have no clue as to why. Now this doesn't happen every single time, but each time it has happened (approx 5 times over the past 6 months) it happens the same way every time. Here how it goes: I'm driving at about 70mph with my lights and fan on and the temp gauge is right in the middle. Then as I put on my brights or honk my horn the temp gauge goes way high. The strangest thing is that the gauge goes up very fast...for example, if i put my brights on the temp gauge goes up to red in about 3 seconds. then when i turn them off, it goes back down in about 3 seconds. WHAT THE HECK COULD THIS BE?
Thanks fellas.
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  #2  
Old May 10th, 2009, 10:20 PM
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Sounds like an electrical fault somewhere, not an overheating issue. Unfortunately, those types of oddball issues are never easy to track down.

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Old May 10th, 2009, 10:23 PM
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bad ground causing voltage to find another path. hi beam and horn share a switch don't they?


Quote:
Originally Posted by johnpiero
I've had the weirdest problem happen a handful of times already but i have no clue as to why. Now this doesn't happen every single time, but each time it has happened (approx 5 times over the past 6 months) it happens the same way every time. Here how it goes: I'm driving at about 70mph with my lights and fan on and the temp gauge is right in the middle. Then as I put on my brights or honk my horn the temp gauge goes way high. The strangest thing is that the gauge goes up very fast...for example, if i put my brights on the temp gauge goes up to red in about 3 seconds. then when i turn them off, it goes back down in about 3 seconds. WHAT THE HECK COULD THIS BE?
Thanks fellas.
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Old May 10th, 2009, 10:55 PM
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Actually quite common when people swap out gauges, etc. I think the best solution is just a separate ground for the temp gauge, but I cant say exactly what fixed it since I did like 3 different things at once in violation of scientific method.
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Old August 26th, 2009, 09:04 PM
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John did you ever resolve this....I'm having that same problem.
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