Fuses keep blowing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**DANTIP** · 12-11-2003, 07:23 PM

My SWB 4x4 keeps blowing the 20A fuse that carries the brake lights, interior lights, dash lights, etc.

The last wiring problem I had originated in the unused camper wiring.

Any thoughts?

cdowns · 12-11-2003, 07:27 PM

very common for the harness along the drivers side framerail to have cracked andor bare wires causing shorts

**old Rusty C10** · 12-11-2003, 07:44 PM

sometimes the clamps themselves puncture the harness and cause the short too especially if the road salt gets in there and eats the wire casing

724x4a/cchevy · 12-11-2003, 11:19 PM

WHat ever you do, dont just put a bigger fuse in it. Ive heard some stories of people just putting bigger fuses in to solve the problem. The wires got hot and melted the wires together, all the car's wiring had to be redone,.

**kwmech** · 12-11-2003, 11:28 PM

Did you check the wires that run under the carpet to the dome light?

Rooster's 67 · 12-11-2003, 11:51 PM

if you do put in a bigger fuse you will eventually "let the smoke out" of the problem section. putting the smoke back in is a B1T(# so start tracing the wires or just re-wire all of it. It'll be ready for another 30 years.

cheatham · 12-12-2003, 12:48 AM

I agree, also if it has been wired for trailer lights, that is the first place place you should check.

krazy_texan · 12-12-2003, 02:21 AM

mine has been doing that recently to, i am trying to figure out though is why mine only does it in the winter usually when the temp drops below 40. the funny thing is that during the winter i will put about 6-7 fuses between thanksgiving and valentines but the rest of the year i will not change it at all. let me know what you come up with on fixing that it irritates the piss out of me.

ps, sorry for stealing your thread and making my post long.

Hooter · 12-12-2003, 03:32 AM

check the condition of the orange/ white wire running donw the driverside rocker 9 times out of ten, sand, dirt and crud rub through the wire

beautimus · 12-12-2003, 03:41 AM

a wise man once said (that means a smart a$$ told me)
the only thing that will blow a 20 amp fuse is (you guessed it)
more than 20 amps. i know that doesn't help but maybe it'll make you grin...... Tony

1969 GMC · 12-12-2003, 05:15 AM

hey I have a similar problem...except that fuse will only blow if I turn my 4 way flashers on. I put a bigger fuse in, and it has been like that for quite some time...have used my flashers alot, once for 1.5+hours, no smoke, everything works fine...?

**DANTIP** · 12-14-2003, 07:59 PM

Problem solved!

The dark green wire running to the light switch was tooooo close to the heat stove on the driver's side exhaust manifold. Some insulation was burned through and the fuse would blow when copper met the steel stove.

Thanks for the feedback!!

72superBB · 12-16-2003, 12:24 AM

Hey there,

I have pm'd you and e-mailed you about your posi rear end. Can you e-mail me or call?

thanks

Ron

roncassie@sbcglobal.net

580-363-9836

12-11-2003, 07:23 PM	#1
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,890	Fuses keep blowing My SWB 4x4 keeps blowing the 20A fuse that carries the brake lights, interior lights, dash lights, etc. The last wiring problem I had originated in the unused camper wiring. Any thoughts?

12-11-2003, 07:27 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	very common for the harness along the drivers side framerail to have cracked andor bare wires causing shorts __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

12-11-2003, 07:44 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,316	sometimes the clamps themselves puncture the harness and cause the short too especially if the road salt gets in there and eats the wire casing __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

12-11-2003, 11:19 PM	#4
724x4a/cchevy Self-proclaimed LED man Join Date: Nov 2003 Location: Harrisburg, Missouri Posts: 1,021	WHat ever you do, dont just put a bigger fuse in it. Ive heard some stories of people just putting bigger fuses in to solve the problem. The wires got hot and melted the wires together, all the car's wiring had to be redone,. __________________ My LED Website My Photobucket Album of LED's Ask me about hand-made custom L.E.D brake and reverse lights. <- LINK I also do LED: -Third Brake/Cargo -Brake (truck and burb) -Reverse (truck and burb) -67-68 Front Turn Signals -69-70 Front Turn Signals -71-72 Front Turn Signals -GMC Front Turn Signals I can also do custom lights for other vehicles....i did a set for a AMC Gremlin once Norwood Survivor

12-11-2003, 11:51 PM	#6
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	if you do put in a bigger fuse you will eventually "let the smoke out" of the problem section. putting the smoke back in is a B1T(# so start tracing the wires or just re-wire all of it. It'll be ready for another 30 years. __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-11-2003, 11:28 PM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,661	Did you check the wires that run under the carpet to the dome light?

12-12-2003, 12:48 AM	#7
cheatham I need a brake! Join Date: Jul 2002 Location: Nashville, TN Posts: 474	I agree, also if it has been wired for trailer lights, that is the first place place you should check. __________________ JP MEMBER OF THE DISCS UP FRONT CLUB 1971 Chevy C10

12-12-2003, 02:21 AM	#8
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	mine has been doing that recently to, i am trying to figure out though is why mine only does it in the winter usually when the temp drops below 40. the funny thing is that during the winter i will put about 6-7 fuses between thanksgiving and valentines but the rest of the year i will not change it at all. let me know what you come up with on fixing that it irritates the piss out of me. ps, sorry for stealing your thread and making my post long. __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

12-12-2003, 03:32 AM	#9
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	check the condition of the orange/ white wire running donw the driverside rocker 9 times out of ten, sand, dirt and crud rub through the wire __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

12-12-2003, 03:41 AM	#10
beautimus Registered User Join Date: Mar 2002 Location: woodstock, alabama, usa Posts: 938	a wise man once said (that means a smart a$$ told me) the only thing that will blow a 20 amp fuse is (you guessed it) more than 20 amps. i know that doesn't help but maybe it'll make you grin...... Tony __________________ i survived cancer and kidney stones, but my kids are killing me.

12-12-2003, 05:15 AM	#11
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	hey I have a similar problem...except that fuse will only blow if I turn my 4 way flashers on. I put a bigger fuse in, and it has been like that for quite some time...have used my flashers alot, once for 1.5+hours, no smoke, everything works fine...? __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

12-14-2003, 07:59 PM	#12
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,890	Problem solved! The dark green wire running to the light switch was tooooo close to the heat stove on the driver's side exhaust manifold. Some insulation was burned through and the fuse would blow when copper met the steel stove. Thanks for the feedback!!

12-16-2003, 12:24 AM	#13
72superBB Registered User Join Date: Nov 2003 Location: Mandan, ND Posts: 422	Posi. Hey there, I have pm'd you and e-mailed you about your posi rear end. Can you e-mail me or call? thanks Ron roncassie@sbcglobal.net 580-363-9836 __________________ Life is full of choices and a Chevy is the best choice. 1990 Chevy SWB



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