brake switch wiring, brakelights, 97 gmc 3500

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hemiboy29

Member - Posts: 22

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Joined: October 30, 2007

Location: Florida, United States

Posted: August 17, 2009 at 3:49 PM / IP Logged

12v Buds,

I was wondering if any of you guys can help me i need the wiring schematic for the brake switch that goes ontop of the brake pedal as well as the color code for the rear brake lights, reverse lights, turn signals for a 1997 GMC 3500? The reason why i need this is because my buddy bought this truck to convert into a tow truck and when they were cutting the bumper in the back they burnt the wires with the torch and now i can't get a signal in the back when he press the brakes, i check all fuses and relays and they are fine but i know something happened because it burnt out one of the battery wires up in the front. I get the signal with my power probe in the rear for the turn signals just cant get any signal from the brake lights. Thanks for your help in advance!!!

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t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 17, 2009 at 4:46 PM / IP Logged

Is the connection that plugs into the back of the brake pedal still there?

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hemiboy29

Member - Posts: 22

Joined: October 30, 2007

Location: Florida, United States

Posted: August 17, 2009 at 6:04 PM / IP Logged

yes it's still there i need to remove the bottom part of the dash to see it clearly but its there

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t&t tech

Platinum - Posts: 2,608

Joined: October 05, 2008

Location: Trinidad and Tobago

Posted: August 17, 2009 at 6:21 PM / IP Logged

have you checked at the connection to see if there is voltage present? and that the switch is outputting voltage when the pedal is depressed, Check these and let me know what you find, ONLY if there is no voltage at the switch, test for continuity between the wires present, you should get continuity between at least two of the wires, let me know what you find.

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hemiboy29

Member - Posts: 22

Joined: October 30, 2007

Location: Florida, United States

Posted: August 17, 2009 at 6:31 PM / IP Logged

Ok perfect i will check it some time this week or if not for sure this saturday i will check it off of the pedal switch and all the way in the back of the truck...

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brake switch wiring, brakelights, 97 gmc 3500

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