what happens with the voltage when you hit the brakes, power windows etc (basically the situation where you get the interference)?
Odd gauge interference
- Thread starter Tony_SS
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megaladon6 said:
car running - stereo / amp (on)
14v battery at the fuse box
13.8v brakes or power windows active
Same results on the Courtesy Fuse circuit
On the Gauge Fuse circuit, car running - stereo / amp on
13.8v
13.5v with brakes or power windows active
Thoughts??
your system voltage is good, so that pretty much guarantees a bad ground (technically a short is possible and it's dumping power to another circuit.-not as likely)
use the contact point on the fuses for the power/ground to check the voltage. this will use the individual grounds and tell you if one is bad, or multiple.
use the contact point on the fuses for the power/ground to check the voltage. this will use the individual grounds and tell you if one is bad, or multiple.
Usually the fuses have two open contact points on the head that you can get a small probe (or paper clip) into. If you move the ground from the fuse to the frame/body and the voltage changes significantly, you have a bad ground.
or you can try and get the probe into the contacts of the fuse (the "spades")
or you can try and get the probe into the contacts of the fuse (the "spades")
basically. your voltage at the fuse to frame/body should always be 12+ volts--really it should match the voltage at the battery at all times. but with a bad ground, the fuse voltage will be reduced. if you have low voltage regardless of ground, it's a bad power connection
another one that usually works is to switch the multimeter to AC when looking for interference, sometimes you can actually see the signal. but you have to do it when you know the interference is there.
another one that usually works is to switch the multimeter to AC when looking for interference, sometimes you can actually see the signal. but you have to do it when you know the interference is there.
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