Grounding the rear bumper - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MylilBowTie · 07-25-2007, 06:36 PM

I'm trying to get some rear bumper license plate lights to work. I have 12 volt power but cant seem to get a good enough ground. If I use a test light it works using the bumper for the ground and the probe in the 12 source. But the license plate light wont come on. All the other lights seem to be fine. I've checked fuses they checked out okay. Thought about using a jumper cable to link the negative side of the battery to the frame and see if that helps any.

Im using a motor mite / doorman 68151 unit.

Srubydo1986 · 07-25-2007, 07:59 PM

are the unit in good shape no corosion also are the bumbs in good shape. my groung goes to the lights ground from the tail lights.

1LoC10 · 07-25-2007, 08:33 PM

i put one of those U shaped terminal ends... dont know what they are called, and srewed it into the stock light holder on the bumper to ground mine

MylilBowTie · 07-26-2007, 10:25 AM

I sanded the area where the lights go into the bumper. Sanded some more on an few other grounds to get better contact. Unhooked the rigged up trailer wire harness all seems good now.

07-25-2007, 06:36 PM	#1
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Grounding the rear bumper I'm trying to get some rear bumper license plate lights to work. I have 12 volt power but cant seem to get a good enough ground. If I use a test light it works using the bumper for the ground and the probe in the 12 source. But the license plate light wont come on. All the other lights seem to be fine. I've checked fuses they checked out okay. Thought about using a jumper cable to link the negative side of the battery to the frame and see if that helps any. Im using a motor mite / doorman 68151 unit. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

07-25-2007, 07:59 PM	#2
Srubydo1986 The Crazy Machanic Join Date: Jan 2007 Location: Nokesville Va Posts: 1,437	Re: Grounding the rear bumper are the unit in good shape no corosion also are the bumbs in good shape. my groung goes to the lights ground from the tail lights. __________________ 1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) 1970 chevelle 2dr sedan Latest update June 24 2007. *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad) newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one

07-25-2007, 08:33 PM	#3
1LoC10 Insert Title Here Join Date: Feb 2006 Location: Dyer, Indiana Posts: 5,679	Re: Grounding the rear bumper i put one of those U shaped terminal ends... dont know what they are called, and srewed it into the stock light holder on the bumper to ground mine __________________ BOBBY _69 SWB_ 1000 pics of 67-72's>> http://s193.photobucket.com/albums/z...-72/?start=all << Last edited by 1LoC10; 07-25-2007 at 08:33 PM.

07-26-2007, 10:25 AM	#4
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: Grounding the rear bumper I sanded the area where the lights go into the bumper. Sanded some more on an few other grounds to get better contact. Unhooked the rigged up trailer wire harness all seems good now. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

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