Electrical Problems. Help... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72MARIO · 07-02-2005, 09:37 PM

Well, I went to start my truck today. The interior light only comes on when I turn the ignition to the On or Acc position. With the door open the interior lights will not come on unless the ignition is switched also

Any Ideas or is that just the way it works.

*Randy70C-10* · 07-02-2005, 09:59 PM

They are hooked up to a fuze that's only powered when the ingition switch is on. All you have to do is get a dummy light and find a fuze that's powered all the time and hooked the interior lights to that one.

72MARIO · 07-03-2005, 12:15 AM

Well the tail lights and dash lights do the same thing. They only work when the key is on or Acc position.

The interior lights are hardwired into the stock harness.

JimKshortstep4x4 · 07-03-2005, 06:17 AM

What you are describing is not normal according to the wiring diagrams and the (9) trucks that we have. The power to the light switch and interior lights should be on all of the time. I suspect that the feed internal to the fuse panel is where the problem is.

What I don't understand is how it could have happened!

Does your truck have the original wiring?

Jim

72MARIO · 07-03-2005, 09:20 AM

Yes, It's original. Mabye it the connection between the firewall and the fuze box ? I will have to look at it tonight.

71RestoRod · 07-03-2005, 09:58 AM

Just a thought... but I would check to see that the plug is seated all the way on your ignition switch.

72MARIO · 07-03-2005, 01:54 PM

I will check that also. It could verywell be the problem. I had the whole harness out of the truck mabye it came loose.

mtdave2 · 07-03-2005, 06:33 PM

maybe its just me, but every single time i have had strange electrical problems it was related to a ground problem. id start checking all your grounds.

72MARIO · 07-03-2005, 07:38 PM

Well I just finished a ground up resto. All the grounds are perfect. I ground the paint off the frame and used stainless bolts. I have a ground from the battery to the frame 1 gauge one from the cab to the frame and another 1 gauge from the motor to the frame. I also dont have power to the starter. I am thinking I should check the fuze box to firewall connection. O most positive thats where the problem is.

72MARIO · 07-03-2005, 11:11 PM

Well I am a dumb ass....... I pluged the engine harness backwards.I flipped it over and everything works right now. Oppps

07-02-2005, 09:37 PM	#1
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Electrical Problems. Help... Well, I went to start my truck today. The interior light only comes on when I turn the ignition to the On or Acc position. With the door open the interior lights will not come on unless the ignition is switched also Any Ideas or is that just the way it works. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-03-2005, 12:15 AM	#3
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Well the tail lights and dash lights do the same thing. They only work when the key is on or Acc position. The interior lights are hardwired into the stock harness. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-03-2005, 09:20 AM	#5
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Yes, It's original. Mabye it the connection between the firewall and the fuze box ? I will have to look at it tonight. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-03-2005, 09:58 AM	#6
71RestoRod Registered User Join Date: Sep 2003 Location: Evergreen, CO Posts: 492	Just a thought... but I would check to see that the plug is seated all the way on your ignition switch. __________________ 71 Blazer / GMPP ZZ383 / MPFI / 700R4 / 4-Wheel Disk / Ground-up frame off almost completed resto-mod

07-03-2005, 01:54 PM	#7
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	I will check that also. It could verywell be the problem. I had the whole harness out of the truck mabye it came loose. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-02-2005, 09:59 PM	#2
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	They are hooked up to a fuze that's only powered when the ingition switch is on. All you have to do is get a dummy light and find a fuze that's powered all the time and hooked the interior lights to that one.

07-03-2005, 06:17 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	What you are describing is not normal according to the wiring diagrams and the (9) trucks that we have. The power to the light switch and interior lights should be on all of the time. I suspect that the feed internal to the fuse panel is where the problem is. What I don't understand is how it could have happened! Does your truck have the original wiring? Jim

07-03-2005, 06:33 PM	#8
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,521	maybe its just me, but every single time i have had strange electrical problems it was related to a ground problem. id start checking all your grounds. __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

07-03-2005, 07:38 PM	#9
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Well I just finished a ground up resto. All the grounds are perfect. I ground the paint off the frame and used stainless bolts. I have a ground from the battery to the frame 1 gauge one from the cab to the frame and another 1 gauge from the motor to the frame. I also dont have power to the starter. I am thinking I should check the fuze box to firewall connection. O most positive thats where the problem is. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-03-2005, 11:11 PM	#10
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,051	Well I am a dumb ass....... I pluged the engine harness backwards.I flipped it over and everything works right now. Oppps __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

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