Discussion in 'Electrical & Audio' started by FireTruck1984, Dec 1, 2019.
Thanks for the great info !
This is very helpful ! Thanks
Thanks, I’ll check those areas
OK, I’m a novice with electrical components but I’ll try to figure it out
A lot of suggestions for this fix, I will try it . Thank you !
You can run the relay straight to the battery but it still wont work until the key is on. Common upgrade for headlamps that way too.
I pulled the power window sub-harness from a Benz sedan - complete with Bosch relays to use for mine. Just have to solder the corresponding switch wires to the harness. IIRC cost me a whopping $10. lol
1977 I believe. When power windows became available.
Great idea! Thanks
I just recently did the lmc truck relay upgrade on my suburban. Ended up replacing drivers side door switch....4 switches in one assembly. And the pigtail... Still had problems until i realized the connectors that go to the motor were bad....replaced 2 connectors at front two motors....and now my windows work great.....lots of power and they are faster than my wifes 2003 suburban windows....if your motors are original than u might want to replace them i had two motors on the rear door....one outta parts truck door.....and they were super slow....replaced the motor with new lmc truck motor....60 bucks....and works great now.....
I like the lmc relay kit because its super easy install with good directions.....i dont think i could build the relay kit myself.....i hate doin electrical......its a 40 dollar kit for 2 doors....comes with everything pre made.....i didnt even solder any wires just used the crimper and butt connectors and elec tape.....just didnt have time to solder all those wires......works great now....
I replaced the motors and regulators.. it seems like a power issue
This shows for 73-87 which is not accurate. 73-76 no power windows 77-81 grounded through the motors and used a different motor switches and wiring. The relay upgrade shown should work for 82 and up.
The windows in my 77 are slow as molasses I usually only use them with the engine running.
That diagram posted up was from a Corvette forum many years ago and its misleading at best trying to apply that to 77-81 trucks and is 100% NOT accurate for 1982-up trucks.
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