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Making some nice progress! I have done the early 4spd to t5 swap several times. In fact, I have a 79 pace car apart right now with the wires hanging. I also picked up another t5 today! The reverse switch setup is really simple, but I'm not staring at it at the moment. Does your t5 have a plug/harness coming out of the top toward the front? If so, that's not the reverse light switch. The reverse light switch is located on the left side of the case. I believe it's just a small switch with two small studs. All you need to do is find your plug (which should be right there in your trans tunnel) and connect them to the studs.... in no specific order.The question I have for everybody here - Anybody ever done this swap for a 1980 4spd to T5? I ask because the backup light switch is not equivalent. Here's a photo of the plug on the 4spd trans, and there's a corresponding plug on the car. I could take a wild guess that the white and black wires are the two I need, but that red jumper wire is throwing me off. I'm ordering a new 2 prong plug to replace the vehicle side. I just need to make sure I'm using the correct wires.
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Thanks - I'd appreciate it. My T5 does have the wires on the top front, and the backup switch on the left side. The harness coming out of my car has a 4 prong plug, not the 2 post. I ordered a 2 post so I could splice it in, I'm just not sure which of the wires should be plugged in. I'm pretty sure I have it figured out, but I'd appreciate it if you could take a picture or give me a description.Making some nice progress! I have done the early 4spd to t5 swap several times. In fact, I have a 79 pace car apart right now with the wires hanging. I also picked up another t5 today! The reverse switch setup is really simple, but I'm not staring at it at the moment. Does your t5 have a plug/harness coming out of the top toward the front? If so, that's not the reverse light switch. The reverse light switch is located on the left side of the case. I believe it's just a small switch with two small studs. All you need to do is find your plug (which should be right there in your trans tunnel) and connect them to the studs.... in no specific order.
If you're not sure which wires go to the reverse lights, I can look at one of my cars tomorrow and let you know.
Thanks for the help! I have a plug on order from LMR. I'll splice it in and see how it works.Ok sorry it took a while. I didn't make it out to the garage till late, and then I had to track down my old Haynes manual and a magnifying glass because the wiring diagrams are tiny! So my cars have a 4-wire plug also. I looked at my 79 cobra, which was a factory auto car and the pace car, which was 4 spd manual. The manual cars use a 2-wire pigtail into the 4-wire plug. Close as I can tell, the 4 wire colors are blk-pink (x2), white, and solid black. The 2-wire plug is just an extension of the blk-pink wires, which are the 12v feed/return for the reverse lights. The blk and white wires, although my Haynes manual doesn't list them or show them, I believe are for the ignition switch relay wire. The red jumper wire is in place because the early manual cars didn't get a clutch start safety switch/park switch. I guess they figured if you're experienced enough to drive a manual, you should know better lol! Anyway, you should be able to cut the plug off. Connect the blk & wht wires. Run each blk-pk leg to the reverse switch studs and you're gtg. Or if you have the plug end that connects to the reverse switch, just splice those blk-pink wires into that. On my other pace car, I think I ended up cutting it off and connecting it with nuts and small ring terminals. Something like that. Seems like the plug wasn't in great shape or didn't fit. It's been a few years and I can't remember exactly.
I took some pics if you need them. I don't think you would be able to make out much if post them here, but I'd be happy to text or email them to you.Thanks for the help! I have a plug on order from LMR. I'll splice it in and see how it works.
I tackled it this weekend, I spliced in the new plug. Thanks for taking a look at it. Here are a couple of photos for folks who may run into this in the future.I took some pics if you need them. I don't think you would be able to make out much if post them here, but I'd be happy to text or email them to you.