Sometimes when driving the gauges and the windows loose power. Im thinking its only when I turn on the a/c for about 20 minutes or so because it stops working to have to turn the car off and then turn it back on. The engine stays on and the radio still works when I lose power to everything else. Any suggestions?
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Check your battery connections to see if they ae clean and tight. Check all the ground wires in the engine compartmen to see if any is loose. Then check under the dashboard ror any loose ground wire connecting to metal points on the frame of the dashboard. You probably have a loose ground somewhere that is intermittently losing electrical contact....good luck!
Could be different problems. The cluster issue could be a problem in the printed circuit board inside the cluster. The cooling fan problem could be low coolant, a blown fuse, a faulty temp sensor, fan motor, or relay.
Some of the older Chevy trucks (and vans) had problems with the connector on the back of the instrument cluster getting loose and losing power. Sometimes you can verify that this is being caused by a loose connector by banging on top of the dash a few times. If the gauges start working, then you need to remove the instrument cluster and repair it. Usually, the solder joints that connect the connector to the circuit board crack and come loose. It can be fixed with some silver solder and a soldering pencil.
sound like faulty alternator voltage regulator. check alternator out put at battery with engine idling should be 13.5 - 14.5 volts at 2000 rpm if not lower you have faulty voltage regulator.also check alternator drive belt and check alternator for loose wires.besure turn off radio before disconnecting negative battery cable to keep from locking out radio losing code.
take a look at the dash ground wire located next to the right of ebrake release handle. if the bole holding the ground wire is loose, which was quite common it will cause all kinds of feed back problems, like described in the comments section to your question.
A faulty temperature sending unit. It should be located on or near the thermostat housing. If any of your gauges reads zero, the check gauges light will come on. Sometimes even if the fuel gauge gets too low, it will trigger the light. It may be the connection at the sending unit. It may have become loose so wiggle it and make sure it is securely connected to the sending unit. If the temp. gauge needle pegs at the top of the gauge, it means the sending unit has grounded out and is faulty. If it jumps, reads off or not at all it could be a faulty sender or a bad connection.
Check to make sure the ground lead-off wire to the fenderwell has not come loose or corroded. Also make sure you have a good engine to fierwall ground, this is the flat braided uncoated piece of connector running from the firewall usually to an intake manifold bolt. Thanks, Dana.