Question about 2000 Chevrolet Blazer

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Wiper motor on 2000 blazer

I replaced the front wiper motor and im getting power to it but it still wont work was wondering if there were relays or anything else i am missing

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Try this... get you 2 pair of small alligator clips... and make you a set of mini jumper cables... with me so far? now... take the wire set you just made... connect one to red... and one to black on battery... remembering to keep the wires seperated... use 2 pieces of cardboard and put one in the engine compartment on top of the engine... and clip the alligators to the other... one on each side, now... i want you to take the meter and connect the negitive alligator wire... to the black wire on the meter... o.k., turn the wipers on... take the red wire of the meter... and touch the wires on the terminals for the wiper motor... with me... now... put the meter on 20 volts dc... when you see 12.0 volts dc... that's the hot wire... i want you to take the positive alligater wire... and attach it to the same position on the motor, so... say it's the one on the bottom right... i want you to put the alligater wire there... so it matches... o.k., now... take the negitive meter wire out of the alligator wire and just let it hang for now, it's fine... it's a ground... it won't hurt anything... it's the red you have to worry about... o.k... i've done car audio comps. since i was 18... stay with me... please, now... we determined the hot wire... now take the black meter wire and touch the remaining contacts on the motor... if you see
-12.0 volts... it's another hot comming out... let it be... go to the next, if you find one with no voltage present... that's the ground for the motor, take the negitive wire of the alligator... hold the motor firmly... and touch that terminal... if the motor does nothing... go get another motor... if it jumps... go get another motor... yes... go get another motor if it jumps... now disconncect everything, well... let me explanin why that is... o.k... on the inside of the cover for the motor... there's a circuit board with a built in timer and 4 wires attached to the motor inside... o.k... positive... negitive... return... and a contact switch, now... positive and negitive are pretty explainatory... the return is funny... if you'll look at the switch... you'll see that there's a delay... well... that's the contact switch... when the motor is switched to delay... the timer sends a signal to the return witch starts the timing process, now... when the motor runs for that delayed time... there's a small cam gear inside which makes contact with a momentary switch... which is the contact switch... it goes in to the wiper switch... and back to the return... that resets the timer for the next time... with me, now... if for some odd ball off chance that the return and contact switch messed up... then the motor won't work... because it can't complete the circuit to the hot wire because the return and the contact switch are in series... there for... if one messes up... no running motor... so go get another motor... if that doesn't work... you have a bad wiper switch... good luck man

Posted on Oct 25, 2008


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