hello, I need to replace an electrical blower fan switch on an old car. I cant find the same one as the car is old. the switch is a off, 1st speed, 2nd speed 3rd speed, high speed, sliding handle type switch. its been going out for years and finally just wont work. i know the blower fan still works, as the fan switch when i leave it on sometimes comes on and blows, but often not the right speed. or it doesnt come on and all. ive been told it could be other things, but ive a feeling it is the switch, as ive watched it going out for 2 years now or so. i dont care if i only have a new switch with off and on, and hook it up to the high speed contact. i'll find a way to mount it. the existing switch is fed by wires that are part of a plug. once i figure out which ones need to hook up with one another for speeds or just the high speeds, do i then cut the wires, be rid of the plug and wire to the new switch. it would be nice to have the multiple speeds too, but if i cant, i can live with that.
Thank you, girard hall

girard

well alas i found the blower motor relay. it is beside and down from the assembly housing slightly. it was hidden behind kick panel material. it is on a fuse block which contains an a/c fuse, the relay, current breaker device i believe. i had been looking at it, but just thought it was some fuse with a different look. finally i saw an illustration in my book that showed all the relay locations on the entire care, it was there and on the fuse thing, and looks like a square black box from looking down on it. a lot of relays probaly look at it.
I'll put my resistor and relay on this weekend and let you know the outcome. again, thanks and you'll probably see me again on here with some other problem, you know how older cars are!!!!!!thanks girard

girard

well strat, im back, suffice to say I've replaced the fan switch, the blower resistor, and the blower relay, and my fan wont blow. however odd thing is, sometime when im driving down the freeway, the fan does cut on at a low speed and run. then the next time i start up it may be still running or most likely will have stopped again. i suspect the blower motor is ok, but maybe not after me replacing everything, i am flabbergasted.
At first, i felt certian it was the switch , then the blower resistor, then maybe the relay, and ive gotten nowhere. what would you do next???? i mean i am beat by this mystery, and this is the kind of luck i generally have too.

girard

Oh yes I forget, can you tell me how to do a shade tree mechanics test of the blower motor. i.e. with jumper wires i suppose. is a jumper wire, just a direct wire connection between two points??

Stratmando

Service Manual with schematic good investment. They may have a Chiltons, Haynes , Clymer, or some manual on your car.
$5 Test Light very helpful, should have good power from fuse, fuse relay, blower switch, then to blower motor. Should be able to unplug at motor and apply ground and hot.
Jumping can be done at relay, switch or to motor.
If jumping directly from battery, Use 10-15 Amp fuse or DC circuit breaker protected jumper,
May have to make. Good Luck. If you could provide schematic, would be nice. Not Necessary.

girard

Strat:remember me??? well Ive returned to beg for help again. haha anyway, my toyota 92 corolla has been over the past 3 weeks been taking a bit longer and a bit longer each time i crank it , to get it to kick on over and start. it used to ALWAYS kick over in 3-4 seconds, i mean almost immediately. now its 15 to 20 seconds and i fear its getting worse. it has a new battery. wires and distributor cap and rotor and plugs replaced about a year ago.
now it does and has for about 6 months had a slight miss when i first take off. it is only for a second or two and goes away. or at least you cant feel it or hear it anymore.now if youre not careful y ou can get caught in this miss area when you first accelerate and have to let off and then accelerate or you will miss for a good bit.
i wonder if this miss is related. should i get new wires, and dist cap and plugs and rotor again. i dont think the timing has slipped either. anyway help if you can. GIRARD

Harvey1955

have you checked all wires for good connections? make sure all are plugged on solidly. good luck

Stratmando

I also would check or replace plug wires, Remove distributor cap and check for moisture.

CaptainRich

A weak ignition coil can cause this type of misfire.

Primary circuit 1.1 - 1.7 ohms
Secondary circuit 9k - 15k ohms