Body Side Power Seat Harness P/N

[08H3]

Since I am in the midst of sorting out an electrical issue that left me stranded the other night, I was trying to clean up some other stuff. Until I looked at the RPO tag, I didn't realize this H3 did not originally come with power seats. Someone swapped in OEM heated leather seats at some point. They wired up the power, but not the heat. I am trying to find the body side harness for the driver and passenger seat. No one can seem to find a part number, either GM or aftermarket. Scrapyard is probably my best bet, but I am still waiting on call backs. Does anyone happen to have a part number?

 

[jimmy p]

If i remember correctly the seats might just connect into the main body harness.

 

[atvspeed4]

Unfortunately its not that easy if you hope to do it OEM. We looked into upgrading one of our trucks and crazy enough GM did not use the same body wiring harness for luxury and base interior models. We chased it all the way to the fusebox which has the spot for the fuse but does not have the pins installed/ wiring underneath to power a different body side harness. To do it right you would need to swap the whole body harness that runs into cab and the bottom half of the fusebox.

Shortcut would be to go to junkyard and get a pigtail cut off the harness and run wiring to a fused and switched 12v

 

[jimmy p]

Yes to what he said

 

[08H3]

Yes, you guys are 100% right about it not being easy! I could not figure out why the PO never bothered hooking up the heat until I started Googling for people who have done it before. Most of those seemed to end in people giving up. I'm pretty confident I can make it work, even without the harness. I'm not concerned about it being a complete OEM installation. It just needs to work as intended and work reliably. My plan is to run a fused hot from the box, and tap into the power window circuit at the sill for the switched hot. Either that, or give up and put them back in as-is!

 

[Happy Hummer]

Conversely,
you can make your own (tastefully done) harness. You could install two switches controlling banks of individual relays. That way both passenger and drive seats would be controlled by 2 sets of relays. Presumably you'd like low heat/high heat for each seat. This could be accomplished with 2 relays for each seat. Most quality relay manufactures make it so the relays can be interconnected via clips, rails, packaging so you can make them look professional. (I'm talking about the plastic cases not the wiring) A two way switch allowing HI/Low would round out the install. I'm sure there are also relays that would allow for both HI/Low to be wired to one individual relay but alas I have not done it this way. You could route power directly from the bus bar in the fuse box. Then use a ignition source as your trigger for the bank of relays.
jmho

 

[Jeepwalker]

I agree. You've probably seen aftermarket heated seat kits (ebay). They probably even sell harnesses for them.

 

[08H3]

Here are the P/N, however all three have been discontinued, so anything you find will be NOS or used:

GM: 88988653
AC Delco: PT2094
Standard: S-1427

I ended up getting junkyard connectors, however I did not look under the passenger seat before getting started. It was another electrical hack job. The connectors on the seat side had also been cut off so it was a spaghetti bowl of wires twisted together. Using the Mitchell and GM schematics, I mostly figured it out. Fortunately, I have another H3 with the base non-power seats as well as one with the heated leather seats so I was able to compare wires and pin positions and figure out the rest. The seat side itself still has a couple of really weird extra ground wires that were put in. I'm not 100% why, however since the power portion worked prior, I went ahead and left them. It wasn't going to hurt anything. Long story short, I now have fully functional heated power seats in what was originally a non-power non-heated truck so it can definitely be done. I also have an ecstatic wife that missed her heated seats, so that's a definite plus!

​

 

[atvspeed4]

Here are the P/N, however all three have been discontinued, so anything you find will be NOS or used:

GM: 88988653
AC Delco: PT2094
Standard: S-1427

I ended up getting junkyard connectors, however I did not look under the passenger seat before getting started. It was another electrical hack job. The connectors on the seat side had also been cut off so it was a spaghetti bowl of wires twisted together. Using the Mitchell and GM schematics, I mostly figured it out. Fortunately, I have another H3 with the base non-power seats as well as one with the heated leather seats so I was able to compare wires and pin positions and figure out the rest. The seat side itself still has a couple of really weird extra ground wires that were put in. I'm not 100% why, however since the power portion worked prior, I went ahead and left them. It wasn't going to hurt anything. Long story short, I now have fully functional heated power seats in what was originally a non-power non-heated truck so it can definitely be done. I also have an ecstatic wife that missed her heated seats, so that's a definite plus!

​

Did you run the power to the factory position in the fusebox?

 

[08H3]

I did not. Like I said earlier, having it completely OEM was not important to me. I used the trailer brake wiring since I will probably never tow with this one. If that ever changes, I’ll probably add a secondary fuse box inside.