Hey all,

So after I installed my Troyer E-Fan kit, I turned on my truck and found I had the following issues:

- Windshield wipers won't turn on, but sprayers work fine
- Horn won't work
- AC won't turn on
- Cruise control won't work

The e-fans use the radio's power supply as the signal wire to allow them to turn on, while a switch in the cab actually turns them on.

When I saw the things that weren't working, I disconnected the e-fans from the truck to see if that changed anything. It didn't.

Now, I'm pretty sure that I managed to knock an electrical connection harness loose somewhere during the install of the fans, but I didn't see anything on a cursory inspection. Does anyone know where I should look?

And before anyone asks, I did check every fuse with a voltmeter to make sure none of them were blown.

Also, I'm pretty sure these are all connected to the same issue because I had just driven from Cali to Vegas and back where I used all those functions at one time or another.

Thanks in advance for any and all help.

TL;DR: Wipers, AC, horn, Cruise control not working after E-Fan install. Help please.

 

When multiple systems fail like that, it's usually the GEM module. Do a search for other posts under GEM module, and this may be the common cause.

 

Those things are on the same fuse. I believe it's fuse #5 on the passenger comparent fuse box. (Under the steering wheel)

 

Passenger Compartment*

 

Wire both the signal and power wire together on the battery

 

Actually, it turned out to be one of the ground connections on the firewall was loose. I don't remember which one specifically, but after I tightened them all down, the problem disappeared.

And wiring the signal wire to the battery is a bad idea, because if I forget to manually switch off the fans after I exit my truck, they would keep running and the battery would be drained.