The heater or blower motor on my 91 previa works some time but has'nt now for the last month. I hear a humming sound that lasts for 10 seconds or so and then seems to kick out. It will do this twice with a gap of a few minutes in between when i start the vehicle in the morn.then it doesnt do this again until i let it sit for hours.i have heat but cant get the full effect because the blower wont kick in to circulate it. Also the blower only works on high when it works.any suggestions?
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try checking main fuse box located in top of dashboard release clip located just above where the ac switch is (or would be if the vehicle doesnt have ac fitted)
Start at the fuel filter. It may be clogged.
Would have been built for R12, can be converted to R134a.
Unless the actual arm is broken, I would just replace the rubber. You can order it from Toyota, and its way cheaper than a whole wipe arm.
It's obvious that you have problems with wiring. I would start from the heater/AC control panel.
I would say NO as the lucida and estima and previa are all different in length and width if you can find replacment arms etc from eBay
no indeed it doesnt have anything to do with it. you see the ac heater has diffrent conections in where the theremostat has nothing to do with if u were talking with temperature changes maybe it would.
you have a shorting wire someplace
get a haynes manual at a library
Other than the obvious leaking hose, radiator, water pump or heater core, it could be internal to the engine. Mine was a leak in the head into one of the cylinders. It puffed white smoke when I first started the engine in the morning but would evaporate before I could check for a sweet smell caused by hot coolant. The engine had to be removed and a weld repair on the head fixed the problem.
It's ether the switch/wiring/bulb/relay. You will need a multimeter to diagnose everything but the relay. You can swap relays from something else to see it it works.