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Old 09-14-2006, 06:06 PM   #14 (permalink)
illflem
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Join Date: Nov 2005
Location: Montana
Posts: 1,308
Quote:
Originally Posted by 99cummins
Maybe a stupid ? but how do you know which is the supply side and which is the load side on the fuse?
You'll know if you got the wrong side if:
1) Your windows no longer work, key off or on.
2) Your heater fan runs without the key.

A test light is better though. With the key on, fuses removed the load side is the side that doesn't light your probe.
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'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Both far from stock
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