um you dont really need a shop to do that. load testing is a good idea. if you have a volt meter just put it on dc volts, put the + to the + , the - to the - , turn the key to the on position (load) watch the voltage then turn the high beams on (more load) and make sure the voltage doesnt drop below 10.5 dcv (i think thats the number). test for about a minute and it shouldnt drop more than one whole volt.

 

check out page 15-3 of the srevice manual