Originally Posted by GulfStrMike
Thanks again for all the help. may need to take it in
If the shop you take it to does not have the wiring plans or schematics they will spend a bunch of time trying to do their diagnosis as they learn your rig's wiring. At $100 per hour, electrical problems can get very spendy quickly.
To give yourself more time to solve it yourself, I would patch a new power cord and ground to each fan's wires from a nearby source as a temporary work around.
This would require some 16 gauge wire for about $10 and a few connectors. Also you would not have to wait while your rig is in the shop.
The hard part is to find a non-switched power wire nearby. Perhaps in a ceiling light fixture even if it is switched?
On my old rig, I have been able to find most of the wiring runs for the house functions in covered channels, cabinets, ceiling etc.
The chassis wiring is infinitely more difficult on a DP.