help with wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mehoff400 · 10-14-2021, 06:29 PM

i just acquired a 85 k5 blazer. the previous owner removed the engine and now wiring is just laying around. before disconnecting everything they left the driver side power window down. i am trying to get it back up but unsure what i need to connect to the battery.

i tried connecting a few wires here to a battery without any luck.

also here i seem to have a few wires cut.
should this ground be connected for the power windows to work?

cadillac_al · 10-14-2021, 08:16 PM

I think if you give that wire with the large ring terminal and fusible link 12 volts and hook the battery to ground it should work.

HAULIN' IT · 10-14-2021, 08:56 PM

For what it takes to pop off the trim panel & get on the window motor, it would likely be a simpler way to go & avoid having another hot wire touch down on something & fry a fusible link or something. Lorne

Pontiac1976 · 10-14-2021, 11:53 PM

Quote:

For what it takes to pop off the trim panel & get on the window motor, it would likely be a simpler way to go & avoid having another hot wire touch down on something & fry a fusible link or something. Lorne

I agree, take your batt just use jumper wires on the the Reg. motor up or down it will go.

Just call me Sean · 10-15-2021, 01:57 AM

The big ring is positive, goes to the starter where the battery positive would be. You'll need a good ground to the body.

**THI** · 10-18-2021, 09:31 AM

That ground coming out of the fire wall where wires were cut is no longer necessary, it was used for the computer for the Electronic Spark Control (ESC). The cut wires would have hooked up to a knock sensor and the distributor, plus a sednoid in the carburetor. That was a stand alone system.

**hatzie** · 10-19-2021, 05:33 PM

The 3/8" ring terminal that's laying on the crossmember is one of the main power connections.
The other main power connection is the stud block on the firewall next to the brake booster.
The braided cable hanging off the firewall is a good place to hook your ground to power up the cab.

10-14-2021, 06:29 PM	#1
mehoff400 Registered User Join Date: Apr 2015 Location: Puyallup WA Posts: 365	help with wiring i just acquired a 85 k5 blazer. the previous owner removed the engine and now wiring is just laying around. before disconnecting everything they left the driver side power window down. i am trying to get it back up but unsure what i need to connect to the battery. i tried connecting a few wires here to a battery without any luck. also here i seem to have a few wires cut. should this ground be connected for the power windows to work? __________________ 66 c10 patina 250 T-5 My truck

10-14-2021, 08:16 PM	#2
cadillac_al Registered User Join Date: Oct 2013 Location: Maine Posts: 2,375	Re: help with wiring I think if you give that wire with the large ring terminal and fusible link 12 volts and hook the battery to ground it should work. __________________ 76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10

10-14-2021, 08:56 PM	#3
HAULIN' IT Registered User Join Date: Dec 2015 Location: Beaver Falls, Pa Posts: 168	Re: help with wiring For what it takes to pop off the trim panel & get on the window motor, it would likely be a simpler way to go & avoid having another hot wire touch down on something & fry a fusible link or something. Lorne

10-18-2021, 09:31 AM	#6
THI Active Member Join Date: Jan 2017 Location: Traverse City, MI Posts: 194	Re: help with wiring That ground coming out of the fire wall where wires were cut is no longer necessary, it was used for the computer for the Electronic Spark Control (ESC). The cut wires would have hooked up to a knock sensor and the distributor, plus a sednoid in the carburetor. That was a stand alone system.

10-19-2021, 05:33 PM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: help with wiring The 3/8" ring terminal that's laying on the crossmember is one of the main power connections. The other main power connection is the stud block on the firewall next to the brake booster. The braided cable hanging off the firewall is a good place to hook your ground to power up the cab. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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