Locating Battery 12V and Ground connections Under dash????? (Page 1/1)
Dennis LaGrua AUG 20, 08:54 PM
Just finishing off the installation of remote locks on my 85GT Ragtop. Having difficulty finding a good location for a constant 12V battery feed for the power door lock transmitter/receiver module. There are many wires there but need the right ones. So far what I have checked are all ignition/accessory switched but nothing constant. Looking in the manual now but would appreciate suggestions.
1985 Fiero GT AUG 20, 10:19 PM

quote
Originally posted by Dennis LaGrua:

Just finishing off the installation of remote locks on my 85GT Ragtop. Having difficulty finding a good location for a constant 12V battery feed for the power door lock transmitter/receiver module. There are many wires there but need the right ones. So far what I have checked are all ignition/accessory switched but nothing constant. Looking in the manual now but would appreciate suggestions.



The radio will have a constant 12v to keep the clock accurate, along with the cigarette lighter, those run off the "bat" fuse, and I think it goes to the convenience center to (for the dinger if you don't turn off headlights etc.)

So if your module is by the fuse box, tap into that, if under the passenger dash, something on the board with the blue dingy thingy/hazard flasher will have constant power, if in the center, radio or cigarette lighter.
olejoedad AUG 21, 08:59 AM
IIRC, the fuse box has a BAT connection on the front face that can be tapped.
Dennis LaGrua AUG 21, 12:47 PM
Thanks for the tips. I realized that the cigarette lighter has battery power but was hoping to get a feed closer to where the control box was located on the driver's side. The logic was to get closer to the power center and to tap off there. Will be back to the chore on Saturday.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

richard in nc AUG 21, 09:01 PM
i plugged mine right into the fuse box.btw my power lock system also has wires to hook to the switch in the door handle.i am trying to fix my 'new' door panel before final wiring.
Dennis LaGrua AUG 26, 08:34 PM
Thanks to all that replied especially Joe and Richard. Confirmed that there is a +BAT connection on the fuse box and it is live.Looks like it uses some kind of one lug connector. I used a spade connector end to plug in the + lead that goes to the door lock actuator box. It fits snugly and firmly. For the negative lead I put a wire lug on one of the 13mm steering column bolts and used that. Works like a charm. All that's left is to find a convenient place to locate the actuator box up and under there. Later on I may add a DPDT switch on the console for inside control but not sure that directly energizing the actuator leads while connected to the actuator box won't burn something out.
Now that I have completed the remote door lock installation job I would say that a medium, skill level can do it. There is some cutting light fabrication/fitting and soldering. For a first time effort I would allow about 6-8 hours to get this job done. A good add-on option for $25. Makes door unlocking convenient for driver and passenger
UPDATE: The power door lock control box on my set up was small enough to fit under the panel below the steering column but you need to remove the front two 7mm hex head screws and loosen the rear screws to allow the panel to drop down. Was the perfect place to locate the aftermarket control box but they may not be the same size for all installs. Tip- the box contains the needed relays so no extra relays are needed. Just need to wire it for alternate positive/negative toggle operation,
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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 09-04-2025).]