If you have a shorted gp, it will trip the breaker immediately and you really wont hear the relays click much. You need to check each gp individually for a reading of around .8 ohms I believe if not someone chime in. I live in S. Miss. and at 94* my 603 won't fire until the plugs are heated. Been there, done that. Look on your drive belt and see if it the right length. OM603 is 2145mm and a 606 is 2140mm. It goes over the ps pump around and under the ac comp around and under the crank pulley, then loops back around the tensioner pulley(smooth side) then under and around the alternator pulley thenup and over the fan and back to the ps pump. Note: it will contact the fan pulley on both going to and coming from the alternator. Make you a crude drawing representing all six pulleys in their respective place and see if that makes sense. Either you have a wrong size belt or it is in the wrong path.
Bud