i got a 73 240z and have recently put in a stereo. After i got it all in i found out that the heater blower motor wont come on. I did clean up some of the wiring in there when putting in the stereo but dont think i disconnected anything. I was wondering if anyone new what wires to check? I think once before the ground wire came off the motor a mechanic told me but i dont know which wire that is? Anyone got a clue? anything else i could check? It really suck driving in the winter withourt a window defroster. Also i noticed that my rear defroster still works but takes forever to defrost the window. Is there a way to put a little more juice in it to defrost the windows quicker? Any ideas on that? Let me know if anyone has run into these types of problems. Thanks a bunch.... I sure love my Z and once before with a previous car without the defroster i hit a parked car cause i couldnt see. I sure dont want that to happen again... Suntadz



5784-Copy of 988775284987_240Zpic5.jpg

 

What voltage is your rear dfroster puttong out? Mine is putting out 4.96 vdc and it doesnt work. So I am going to be re doing it and trace the wires to see if I can boost them. I will keep you informed.

Shane Morton 78 280Z owner.
Z me go - Z me show - Z me gone

 

There is a small wiring harness that goes from the heater switch to the blower. 2 wires come off it, the ground and the power source. The power connects to a blue wire with bullet connector. Mine was hooked up to the wrong blue bullet and the dash lights were alway on. I found anouther loose blue wire and switched over to that. I never hooked up the old blue one to anything, but every thing now works fine. So if is is the power wire unhooked, make sure you hook it to the correct blue wire. The ground is nessisary as well.