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Or your battery is low on charge.



The voltage monitors system voltage. It recharges the battery and runs all the electrical components while the engine is running. First thing is to check you battery, how old is it, is it still good, meaning will it take a charge? Make sure it is charged, if you have been starting the engine many times the battery could be low, that is the biggest draw on a battery. Also check your battery cables, clean posts, ends, snug clean and dry connections on both ends of both cables. Then check out the bulkhead connector, same as battery connections. These things are important on all cars elec systems.