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01-18-2017, 11:48 AM | #1 |
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Location: Lake Forest, CA
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70 GMC parking lights in grill don't come on
On my 1970 GMC, the parking lights in grill don't come on, the turn signals work fine, the side markers work fine, but the parking lights in grill do not come on in any switch position.
Maybe these don't have parking lights there? I don't have a WD to check against. Thanks!
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
01-18-2017, 12:06 PM | #2 |
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Location: Liberty, & Garden City S.C. , U.S.
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Re: 70 GMC parking lights in grill don't come on
Look and see if they are double element bulbs. If they are then something isn't working. If the are single elements then your correct.
According to this post you should have park lights also. http://67-72chevytrucks.com/vboard/s...d.php?t=596540
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. Last edited by Andy4639; 01-18-2017 at 12:21 PM. |
01-18-2017, 12:22 PM | #3 | |
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Re: 70 GMC parking lights in grill don't come on
Quote:
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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01-19-2017, 12:16 AM | #4 |
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Re: 70 GMC parking lights in grill don't come on
I had a similar situation in my 70 Chev. I had to run extra ground wires to those lights. I made a "pig tail" which was a wire with a ring terminal on both ends. One end went under the head of one of the light's mounting bolts. I found an original hole in the radiator support. That's where I put the other one with the help of an extra bolt.
Try touching a scrap of wire by hand to see if that fixes it temporarily.
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01-19-2017, 06:59 AM | #5 |
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Re: 70 GMC parking lights in grill don't come on
The front parking lights should be running lights and turn signal's both. Side markers will only be running lights. They didn't start having the turn signal's until 71.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
01-19-2017, 08:58 AM | #6 | |
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Location: strausstown pa
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Re: 70 GMC parking lights in grill don't come on
Quote:
Pull a bulb. there should be two contacts in the bottom of the socket. And two contacts on the bottom of the bulb.
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01-19-2017, 09:31 AM | #7 |
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Re: 70 GMC parking lights in grill don't come on
get a tester and see if you have power at the plug, check with a different ground and islolate the problem to the plug conntection, bulb, or ground. if those check out and it still doesn't work you can run a new hot wire off the headlight switch.
I'm guessing you won't have to do that though. prob ground issue. changing electrical problems is a game of elimination. Mark |
01-19-2017, 03:05 PM | #8 |
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Re: 70 GMC parking lights in grill don't come on
If the turn signals are working I would guess that grounds are not the problem especiallly when both lights aren't working.
The parking lights are fed by a purple wire straight from the headlight switch which starts as a brown wire and runs to the firewall block where it connects with the purple wire that goes to the parking lights. I would pull the socket plug off the left light cause it's easy to get to and jump from the battery positive to the purple wire terminal and see if the right light comes on. If it does then there is a power problem not a ground problem. follow the purple wires back to the firewall block. On the inside of the cab they connect to the brown wire that runs to the head light switch. Have you checked to see if the bulbs are good?
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03-22-2017, 11:26 AM | #9 |
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Re: 70 GMC parking lights in grill don't come on
Turned out my parking bulbs were burned out (D'oh).
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
03-22-2017, 11:37 AM | #10 |
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Re: 70 GMC parking lights in grill don't come on
Like the saying goes, when you see hoofprints, think horses, not zebras!
Sometimes it's the simple solution :-)
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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