Dash gauges stop working while driving

2006 FORD F-150
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MICK1064
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Electrical problem V8 Four Wheel Drive Automatic 59000 miles

2006 5.4, while driving I'll see the dash gauges drop, radio quits, no power windows.The , cruise, lights heater motor still work tho. After a short period they jump back up or if I stop, shut it down and restart it all is fine, for a while. I also hear what sounds like a pressure relief valve releasing, and when the gauges are down and I am coming to a stop, it sounds like the tranny is grinding . No Warranty left and can't afford the dealer prices. HELP !!!

Someone mentioned the ignition switch, but I am no mechanic. How would I go about replacing the ignition switch, if you believ that might be the problem ?
Feb 9, 2010 at 1:40 AM
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STRAILER
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Hello,

There is an accessory delay relay that powers the items you are talking about I think is going out.

Here is a power wiring diagrams and the guide to test the relay with the relay location.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Feb 2, 2018 at 5:18 PM
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MICK1064
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You guys are the best! that was the problem as soon as I found the relay and removed it I could see where it was super heated. Thanks again you guys are the best!

Feb 2, 2018 at 5:19 PM
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