Nantra, I have had the same trouble, but it will eventully start. Where exactly is the relay and what does it look like. I thought it may have something to do with the shift lever and neutral switch.
1989 Southwind P30 chassis, 454Chev.
My Chev. has broken the serpintine type belt driving the water pump twice. This installation turns the water pump in the standard direction whereas the newer serpintine belts turn backwards from what we are used to. The problem seems to be that the contact only covers less than 45 degrees of surface of the fan pully. When the fan clutch engages the belt will slip and burn up.
I am installing Flexolite m/n 295 and removing the driven fan entirely. I hope the earlier chassis has the "V" belts. Jesse