RXRodger

iTrader: (2)

switch. Will this work?




I know I can activate the blower by just grounding the wire from the relay, and I should be able to put 12 volts on the transistor to get it on high, but my question is can I use the 12 volts from the relay as my 12 volts for the transistor? I just need to be able to hit a switch and it come on high, at least that is the optimum for what I need.

This is on a 92 SC300 if it matters.

Kris9884

iTrader: (7)

Hmm no idea, I just set the **** to 70 all day, every season and it does the rest..

RXRodger

iTrader: (2)

Glad you could contribute to the thread,

estomax

iTrader: (2)

it looks like if you just ground the L-R wire coming out of terminal 1 of the blower motor then it will turn on full speed. seems like an easy thing to check also then just wire that to a switch and ground it out as needed..

what triggers the heater relay on top? maybe you just run your switch off of that and permanently ground the blower motor terminal 1 wire.

are you trying to bypass the whole climate control box?

cheers
Marko

RXRodger

iTrader: (2)

This is in a stripped race car. I was looking for a way to turn the blower on and have 2 speeds with a dpdt toggle switch. I could do what you said on grounding out of blower motor but that would have been switching full motor amps, need to avoid. I figured out I could put the 12 volts out of the relay across the transistor to get high speed, just ground the relay directly to get low speed. However, as I was hooking up to my new switch panel, I screwed up and shorted the input to the transistor to incoming power to my kill switch and it must have fried the transistor. So, I put a bypass loop in the plug to/from the resistor and switch the wire coming from the relay to ground to get high only. So, I didn't get all I was looking for but only having high speed will work. All I am looking for is the ability to switch on the defroster when needed during rain or foggy conditions during a race. It will work like I have it now.