freaky stuff when blowing cold
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freaky stuff when blowing cold
<TABLE><TBODY><TR><TD vAlign=top width="100%">Hi everyone
I have a 99 F150 5.4l 2wheel drive with a crazy problem. When I'm driving and only when the A/C is on my electrical system goes haywire. It feel like a total loss of power rpm gauge goes crazy, theft light starts flashing and gives a 16 code, sometimes speedodemeter acts up, will through the truck out of overdrive and cruise control, everything will still be on but it acts like it has an electrical short. Have brought it to dealeship and numerous mechanical shops to no avail.
Only happens when A/C is turned on can drive truck all week with it off and no problem. sometimes happens right away sometimes takes a while, and problem is getting worse. have changed iginition switch, alternator, tps sensor and still problem persits. any clue?
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I have a 99 F150 5.4l 2wheel drive with a crazy problem. When I'm driving and only when the A/C is on my electrical system goes haywire. It feel like a total loss of power rpm gauge goes crazy, theft light starts flashing and gives a 16 code, sometimes speedodemeter acts up, will through the truck out of overdrive and cruise control, everything will still be on but it acts like it has an electrical short. Have brought it to dealeship and numerous mechanical shops to no avail.
Only happens when A/C is turned on can drive truck all week with it off and no problem. sometimes happens right away sometimes takes a while, and problem is getting worse. have changed iginition switch, alternator, tps sensor and still problem persits. any clue?
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Hotshot
Joined: Jan 2004
Posts: 19,760
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From: St Louis
Inspect for any wiring bundles lying against the accumulator can. Move all wiring harnesses as far away from the accumulator can as possible and tie them off and see if your problem goes away.
Steve
Steve
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Joined: Jul 2005
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funny things happen when the alternator stops putting out and the truck is running off the battery voltage only. im thinking the AC draws big power and more than the alternator is putting out. agree, check the grounds and wires to the alternator.--- no charge lite when this occurs? how about the volt gauge dropping down?
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Okay guys ready for this one. Today it did it without the A/C running, did it bad enough that it killed my truck on a curve. Almost wrecked the thing, changed out the ABS speed sensor like I found out in other post took it for a ride and it did it again. Thing is nothing else goes crazy lights don't blink, radio still works, everything is constant. Why would my theft light start blinking and give me a 16 code? Should I go ahead and change out the other sensors on the trans? Started checking grounds so for no problem.
