Thought I'd share some info....
I have the Ramcharger dual fan set-up on my 87 GN using the RC harness.
At the prompting of another tb.com member, I checked the harness wires while the fans were running. Just like the other member....the wires and harness on my fan were VERY hot.
So, I figured that I would rig up a separate relay to "hot wire" the dual fans. Hopefully this will save my original wiring from burning up.
What I have now is a 10ga wire straight from the back of the alternator through a 30A fuse (to the relay then) to the fans. The fan ground is 10ga from the fan connector to a bolt on the driver's inner fender (already two factory grounds there).
The factory wiring now triggers the relay. I was able to cut up the RC harness so I didn't have to butcher the factory harness....plus used the other connector for the fan.
Hooked it up....and flipped the manual fan switch....click...pop...blew the 30A fuse. Hmmmm....checked everything out. Nothing wrong. Replaced fuse and tried again....POP.
Time to get out the old Fluke meter. On the meter, when the fans start-up the current surges to 33-35 amps then quickly drop to 17-18 amps. Tomorrow, I'll make a run to the parts store for some 35 and 40 amp fuses.
I tried it several times, and each time, on initial start-up the fans were drawing around 34 amps, but within a second or two the current went down to around 18amps.
There you go....FWIW.
John
I have the Ramcharger dual fan set-up on my 87 GN using the RC harness.
At the prompting of another tb.com member, I checked the harness wires while the fans were running. Just like the other member....the wires and harness on my fan were VERY hot.
So, I figured that I would rig up a separate relay to "hot wire" the dual fans. Hopefully this will save my original wiring from burning up.
What I have now is a 10ga wire straight from the back of the alternator through a 30A fuse (to the relay then) to the fans. The fan ground is 10ga from the fan connector to a bolt on the driver's inner fender (already two factory grounds there).
The factory wiring now triggers the relay. I was able to cut up the RC harness so I didn't have to butcher the factory harness....plus used the other connector for the fan.
Hooked it up....and flipped the manual fan switch....click...pop...blew the 30A fuse. Hmmmm....checked everything out. Nothing wrong. Replaced fuse and tried again....POP.
Time to get out the old Fluke meter. On the meter, when the fans start-up the current surges to 33-35 amps then quickly drop to 17-18 amps. Tomorrow, I'll make a run to the parts store for some 35 and 40 amp fuses.
I tried it several times, and each time, on initial start-up the fans were drawing around 34 amps, but within a second or two the current went down to around 18amps.
There you go....FWIW.
John