I’m looking at getting used wiring harnesses for my truck to use as a template to build new ones. I’m finding that the part numbers were updated every few days it seems. I’m exaggerating, but there’s a bunch of part numbers for wiring harnesses within a small range of years. How different are they really? When I’m looking at eBay, they’ll say something like 94-95 pickup/4Runner.

Does anyone have any experience with wiring harnesses that can confirm that I need to be super specific with the part number, or confirm that it really doesn’t matter, it’s just a different type of tape they used or something trivial.

Extra information: I have a 94 pickup ext cab V6 4x4 SR5

 

You must be looking at an engine harness, other wise I don't see how a rear body harness from a 4runner fits a pickup. In that case you should be able to find a match with a decent photo of the body/ecu side of the plug.

If your looking for body side stuff you need to match your chassis style (RN8#,RN6# for example) and it needs to have the same or higher options. In your case it's an SR5 so you have pretty much everything they could throw at it. It's worth noting some of them came with the higher optioned harnesses, an example of this is the cluster swap where they already had the tach signal at the cluster plug.

 

Yeah, I’m looking for engine harnesses first. That’s good advice about the chassis code. Thanks.

I’ve been splicing and soldering and repairing wires continually since I got this truck. Seems like every time I touch something, the wires basically crumble. I’m ready to just rebuild it. But I can’t take mine out, because I need it to drive, so I’m looking to get another one that I can rebuild on my weekends. Didn’t expect there to be so many part numbers though.

 

Wiring harnesses are not fun to look up. Toyota put a sticker/label on their harnesses and it was often easier for me to climb under a vehicle and try and locate the harness label than go through 15-30 part numbers on the microfiche and do a process of elimination. Toyota trucks were the worst for the sheer number of possibilities because they were just SO many variations(long bed, short bed, xtracab, atm, manual, etc etc etc.)
CO 94 PU gave good advice. As long as you match the first 7 characters of the vin you should be pretty close. If you find a part number and want a "double check" post up with your model# and I can try and check. The model number is sorta like a vin, but different. Something like VZN95L-MSREA.

Eastern Beaver can get you the Yazaki terminal ends that are the same as Toyota used. Infinitely better than the flimsy ones typically sold at retail stores. The only hitch is they're open barrel and require a special crimper. But you can do that "double crimp" where you crimp on both the wire and the insulation. Eastern beaver ships out of Japan, but he's pretty darn fast. And prices are very reasonable. The open barrel crimp takes a little practice, you'll ruin the first 4-6 you do(videos on youtube help) but once you master it you'll be very happy that you did. I got a decent crimper off Amazon for $65

 

Thanks for the heads up. I’ve been searching for the actual plugs. Figured I would have to learn CAD and have them 3D printed.

Edit: Actually, I think you’re talking about the little metal ends on the wires that push into the plastic housing/plug. I need to learn the terminology a little better.