Blowing fuses...where to start? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Daubs** · 02-16-2005, 12:09 AM

72 K20. Just home Sunday. Brakes did not work, nor did turn signals. Did have flashers in front and right rear. Got into the rear lights and dug around. Then blew "traffic hazzard" fuse. Oops.

Truck did not have fuse in the "tail stop / park dome" slot. I put one in and the dome light comes on. Press the brake and the dome dims...press brake four or five more times and blow the fuse.

I know I'm going to have to go through the wiring. Any suggesions on where to start?

68w/sbc406 · 02-16-2005, 12:12 AM

you dont have a busted blug anywhere that could be touching ground, i blew some fuses that way

69 Short Fleet · 02-16-2005, 01:29 AM

I'd start by checking your brake light switch itself (may be faulty) and its wiring, next check or replace all main grounds, cab to frame, box to frame, ect and look closely at the rear wiring harness.

**Daubs** · 02-19-2005, 12:43 AM

Found it -- Yellow wire got caught between frame and bolt. Grounding and shorting out fuses. Fixed her and my dome / taillights work well.

Turn signals don't "blink" but I think I'm on that. Thanks for the help.

02-16-2005, 12:09 AM	#1
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 613	Blowing fuses...where to start? 72 K20. Just home Sunday. Brakes did not work, nor did turn signals. Did have flashers in front and right rear. Got into the rear lights and dug around. Then blew "traffic hazzard" fuse. Oops. Truck did not have fuse in the "tail stop / park dome" slot. I put one in and the dome light comes on. Press the brake and the dome dims...press brake four or five more times and blow the fuse. I know I'm going to have to go through the wiring. Any suggesions on where to start? __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

02-16-2005, 12:12 AM	#2
68w/sbc406 Got Light Emitting Diode? Join Date: Apr 2004 Location: Newberg, OR Posts: 2,485	you dont have a busted blug anywhere that could be touching ground, i blew some fuses that way __________________ 1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's(the family car) 1993 Cherokee work ride/weekend wheeler

02-19-2005, 12:43 AM	#4
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 613	Found it -- Yellow wire got caught between frame and bolt. Grounding and shorting out fuses. Fixed her and my dome / taillights work well. Turn signals don't "blink" but I think I'm on that. Thanks for the help. __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

02-16-2005, 01:29 AM	#3
69 Short Fleet Registered User Join Date: Nov 2002 Location: Kelowna B.C. Canada Posts: 1,086	I'd start by checking your brake light switch itself (may be faulty) and its wiring, next check or replace all main grounds, cab to frame, box to frame, ect and look closely at the rear wiring harness.



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