windshield wipers do not work and car heater does not work and the signal lights do not work
My don't windshield wipers, car heater, directional signal lights work? on 1997 Nissan Altima
You can start by checking your fuses for the items that aren't working maybe is a bad fuse.
There's other things that do work on the same circuit. Wow didn't you read my post.
TRUST PROFG AND FOLLOW THE DIRECTIONS HE HAS GIVEN
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While looking at a wiring diagram, the only common thing in those items is common grounds. There are many other things that share the same grounds, so I don't know why just those items alone did not work, and the other things are working. They have different power circuits, accessory relay, and the ignition 1 relay. There again other things on those circuits will work, Will probably need to be tested by a technician.