Blower motor/pw/pm

[deploytosave]

huge props to moe30 for the idea/the help/ running out and tearing apart his car at 9pm lol

[moe30]

Go me! lol

[deploytosave]

power windows = fuse 19

windows = bad window circuit breaker...

blower motor= ???

[deploytosave]

fuse 19 was blown, replaced it.. i now have power mirrors.. but still nothing else.. i reattached the wire back to the unloader switch on the starter and sure enough mirrors are still working..

so now im down to this, my relays seem to be good, and as far as i can tell the unloader switch is also good..

but i still have no blower motor nor windows :(

[deploytosave]

whenever i ground the unloader switch relays k5 and k7 both click...

this is frustrating

[deploytosave]

ok so i took the top post/ black and green wire off of the starter and gounded it.. it made a clicking noise in the fuse box, and would also make my over head "srs" light flash but still no blower motor/windows/mirrors..

ive now replaced the relay and tried grounding what i belive to be the unloader switch..

am i doing something wrong? please help out here :(

[deploytosave]

drive sideways from now on.

dually noted

[Kershaw]

drive sideways from now on.

[deploytosave]

here is a new one, maybe this will tip someone off as to what it could be...


i took a corner and got a little sideways, when ever i got straight, it jerked the car a little bit, and then bam, my blower motor kicks on..

stayed on for maybe 5 mins, then shut off, and wont turn back on now..

[deploytosave]

if i swap relay k6 with relay k7 and nothing happens i should assume that im going to just need a new starter correct?

getting reeeeeally tired of not having heat haha

[deploytosave]

wow, this site is amazing.. excellent information, i will be trying this tomorrow...


cannot thank you enough

[jlevie]

Do all oem replacement starters have a unloader switch signal contact?

An OE replacement starter, by VIN from a dealer, should be in the correct configuration for the car (with or without the unloader switch as appropriate). Since BMW used starters with and without the unloader switch for E30's, you have to make sure that a replacement starter is in the correct configuration for the car.

[b*saint]

Do all oem replacement starters have a unloader switch signal contact?

[jlevie]

The unloader relays aren't closing or are bad. The coil of those relays receives switched power and the ground for the coil is via a switch in the starter. When the starter is operating that switch back feeds the coil with power to open the relays. When the starter isn't operating that switch goes to ground to operate the relays and enable those circuits. Thus having those items disabled is most likely to be failed relays or a bad unloader switch in the starter.

A workaround for a bad unloader switch in the starter is to disconnect the unloader wire from the starter and ground it. Just make sure that the wire is the unloader circuit and not the start lead to the solenoid. If you ground the start lead by mistake, the starter won't engage and smoke will appear from the shorted wiring. The simple test to make sure that you've disconnected the unloader lead is to keep it isolated and try starting the engine. If it starts you have the right wire and if not you have the wrong wire.

Engaging the unloader relays all the time the ignition is on won't hurt anything. Early cars with the two wire starters are configured that way.

[deploytosave]

K7 is a relay in your fuse box...

does it control the above listed things?


thanks for the quick reply