78-83 delay/pulse conversion kit for 73-77 trucks

[gmachinz]

Ok...let me explain this kit. My father in law wanted a factory style pulse/delay setup in his 77 GMC High Sierra currently being built by the two of us. Well, knowing scarce/factory 1977 specific delay stuff is at best marginal design wise, I've done some homework with using a 78-83 setup since they are slightly more plentiful. So, this kit gives you:

1.) delay wiper switch and module (78-83 type)

2.) harness extension from module to firewall interior bulkhead (these wires replace your existing 2-speed wiper leads

3.) harness adapter for the exterior firewall bulkhead and requires you to swap your existing wiper motor on 73-77 trucks to a 78-83 permanent magnet type.

I have designed diagrams showing which cavities to swap your old leads in favor of mine and I chose to retain the 78-83 color codes also. You will notice on your 73-77 leads that you'll be splicing the WHT for power from my harness to your YEL for power from your 73-77 fuse panel for example. There is an additional wire to run from the bulkhead on the firewall side that is not present in your existing bulkhead.

Lastly, you will need to enlarge the wiper switch opening on your dash to fit the slightly bigger wiper switch-a dremel and patience is the best method.

All of these mods are explained in a GM color coded diagram which I include with each kit. Now, I'm just getting an idea who may be interested in a kit before I commit to building 15-20+ before I start running low on delay switches and modules. I plan to test this harness kit out this weekend on my father in laws' 77 GMC so I will post results soon. Meanwhile, let me know if you have questions or would like to be added to the "want list" for a kit after testing is completed.