Pontiac Repair: blower motor, fuse box, purple wire

Question
Hi Todd,great job you are doing. niece's 97 bonneville blower motor keeps running with key off.you have to turn off at dash. reading some of your other questions about the bad ground at drivers floor and behind glove box is problem the cure. stealing ground and problem holding relay on. hard starting at times with no fuel pressure.a little research before i dig into. thanks once again for being helpful. Rich

Answer
Hi Rich:
I think this has more than 1 problem. The ground issue under the sill plate could be your fuel pump issue for sure! as for the blower motor it can be a few issues. If it has automatic A/C the blower motor control module could be bad. If it has manual A/C and the blower stays on HI it could be a high blower relay sticking On But I'm not completely sure of that I don't have access to wiring diagrams further back then '98. to tell for sure unplug the relay for the blower motor and if it turns the blower off you know that is the issue that relay is more than likely powered up at all times. the relay is under that big plastic cover on the rear of the engine compartment it's more than likely on the right side of the relay/fuse box there are a bunch of relays in there. The one for the blower motor has a heavy gauge purple wire in it it should be the only relay with that color wire. The relays all look the same. good luck :}