Lights always on

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Apr 9, 2004 | 12:50 PM

frankeb

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Lights always on

I have a 92 F-150 xlt. Everytime I connect the battery the lights come on even with the switch off, so I removed the head light switch and it still happens. Even with the ignition switch off it does it. Also it sounds like its running a pump in the transmission so I unplugged the wires to the tranny to trouble shoot before it ran the battery down. I have seen no coroded wires or any exposed wires grounding out. I have about disassembled the entire truck to find the problem. So I decided to come here and ask for help. Hope I'm in the right place.

Frankeb

Apr 9, 2004 | 01:10 PM

LoosMaster

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From: Louisiana

The pump running noise is probably the relay for the elect fuel pump. It's located under the hood, l/h side just behind the air filter box. Give it a tap and see if it stops. If it not unplug it and see if it stops. If either works, replace the relay.

Apr 9, 2004 | 01:29 PM

LoosMaster

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From: Louisiana

I was looking at my schematics, check you high beam switch, click off and on and see if light go out. There is a seperate power wire for the high beam side that does not route through the dash switch. Hope that works.

Apr 9, 2004 | 01:33 PM

frankeb

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the noise i heard was actually in the transmission. I crawled all around the truck to find the noise using my stethescope and my ears and when i unhooked the harnes on the drivers side of the tranny it quit, at first i wondered if the tranny had an electric pump but i have never heard of that before, thank you for your response will double check that relay

Apr 9, 2004 | 01:50 PM

frankeb

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good news, dummy me didnt notice hazard switch was on so lights back to normal, now to figure out the humming noise in tranny when power is connected, i get an ERROR.3 in odometer when switch is on , will not turn over with switch or crossing the solenoid, there is a distinct humming in the transmission when power is connected

Apr 10, 2004 | 10:00 AM

SoCalDesertRider

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From: USA

Check the starter and the solenoid. Maybe the humming noise you hear in the tranny is comming from the starter?

Apr 10, 2004 | 10:37 AM

frankeb

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yea, took starter off, tried testing it it seems bad so taking it to get it tested. Humming noise stopped though when i shifted the gears into neutral. Its just the weirdest thing i ever heard. I appreciate the help from you all, Have a Happy Easter.