Moved: '00 QX-4 Blower Problem

[Q-Rod]

My 2000 QX 4 has auto air, naturally.The HVAC blower doesn't respond (turn on at all) although the fan indicator lights operate normally. I ran current directly to the blower and it operates fine and at full speed. The relays are fine as well as the fuses so current is getting to the blower normally and the problem appears to be in the ground circuit. There is continuity from the blower to the fan amp and from the fan amp to ground. These symptoms are a little different from what I've read as pointing to the fan amp. From what I know the blower runs full speed when the fan amp fails. Agian, my blower doesn't turn on at all. Could this also be tha fan amp?

[maxnix]

Welcome in to our club.

Try posting in Infiniti Online Mechanic Forum for a quicker reply.

[Q-Rod]

Thanks man, will do. I plan to keep the Q and look forward to more projects and forums on the site. Take care, Greg

[Q-Rod]

The dreaded fan amp, it was. I'm back and running after $150 + tax for the fan amp at the dealer.I learned you can test the fan amp with an ohm meter. The resistence accross the ground circuit leads on the fan amp (about 5k ohm) should match that of the resistence accross the input lead and the lead to the dasbord control unit. My broken part had infinate ohms from the input to the control lead. No connectivity, no fan.

Anyhow it takes much longer to remove the glove box than it does to replace the fan amp. and man did the glove box need attention too.

Thank you to all at the forum.

Q-Rod