No start after working on power windows

[tucsonjwt]

I replaced the wiring harness/ connector on my driver's side power window and it worked fine. Two days later I have no start. I have an 83 C20 454 with granny 4 speed manual transmission.

I have dual start batteries with 95% state of charge on both batteries. Battery connections are tight. I have LMC relay upgrade and all of the relays check good with a relay tester.

Before I start poking around aimlessly under the dash I could some guidance. I suspect the clutch safety switch might be an issue, but I hope not since they are no longer available.

I hate working under the dash because I am a big handed 6'2" overweight guy and that fuse box is almost inaccessible for me.

Any tips would be appreciated.

Thanks