Even if the GP temp sender is unplugged the plugs should still go out shortly after the engine starts.
If a relay sticks on and the plugs never get turned off, they can melt themselves and the tips can get swollen... and then you may have trouble getting them out. Or even worse, a tip could come free and drop into the combustion chamber and do major damage. If the relay sticks, unhook the power to it right away, otherwise you may end up causing lots of other trouble for the motor.
A light on the dash to monitor if the plugs are glowing or not is a great idea to avoid this problem.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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