Hi all,
As many of you already know, there is very little of my original truck left, so everything I do somehow has to Frankenstein together some old parts and some new parts. This is no different.
It's an '84 Bronco, 460 transplant using an Edelbrock Pro Flo 4. The original EEC has been pulled out, but most of the original wiring for everything that wasn't connected to the EEC remains. The Bronco came with the factory A/C and has the original hardware installed for the most part, except for the compressor. All of the other parts have been replaced with new OEM style where available. The compressor is a Sanden 5 series, I believe.
I am trying to wire the A/C controls to the clutch cycle switch and the compressor. As I understand it, the light green wire with pink (or purple?) dashes coming from the firewall harness connects to the clutch cycle switch. That is as far as I get before confusion sets in. It appears that the other connector on the cycle switch should go to the only wire on the Sanden (it doesn't have a ground because it grounds via the engine mount). That makes sense, except it doesn't account for the diode that I have on the original harness. In looking at the diagram on the EVTM, it seems like the wire that goes to the Sanden should also splice off, go through the diode and then go to ground, which does not make sense to me at all because then it would never actually result in power being sent to the clutch (it would just follow the path of least resistance and go to ground instead).
I never trust myself in these situations; I had to take circuits twice in college and still got lucky to get through it with a C so it is not a strength for me. Any advice here?