[RICK LAKE]

Archrms Look for a 30 amp relay if you can't find a 20. Most snap right on. If that relay is worn out and you can get the cover off, check and see if the contacts are burnt or welded together. For a pinch you can clean them with fine emery paper and they should work again for a short time. IMO the problem is the spike when the fans or fan comes on. The spike can be on a fan motor from 40 to 70 amps. This is why you also have slo-blow fuses in the car. 30 amp relay has the same mounting setup. The diagrams is printed on the side of the relay to check. 30 is heavy duty. It will take more abuse and last longer. I have 30's on all my heavy drawing curcuits. Cooling fans, each fuel pump is seperate, accusump, and blowers. I took them off, too much load for my charging system. Need to up it to 100 amps from 70. Have you fill the new room yet? Any day now and the fun begins. Only Kidding. Best to the both of you. Rick L.