On Sat, 09 Jul 2005 16:17:22 GMT, Rob wrote:
'Anonymous wrote: '> On Sat, 9 Jul 2005 07:29:07 -0400, "SC Tom" wrote: '> '> ' '> '>
'> '> I took the motor out and applied 9V DC to its terminals, it makes some '> '> noise but '> '> does not move the spindle. '> '>
'> 'Depending on what you were using for a power source, 9VDC may not spin a '> '12VDC motor. Wiper motors draw a few amps, so a small 9V battery eliminator '> 'or similar supply isn't going to have the juice to turn it. You could try '> 'connecting it directly to the car battery and see what happens, making sure '> 'you have the polarity correct. '> 'Good luck! '> ' SC Tom '> ======================================================= '> '> '> You are right, my source was not capable of delivering Amp, it could only '> deliver mAmp. Anyway, I used a better source of power and found the motor to be '> working, I also noticed that it is the polarity reversal that reverses the '> direction of the motor and brings the wiper back. The wiper still des not work '> when connected to vehicle wiring, the issue now is that a Relay has to be '> involved to run the rear wiper. '> '> Interestingly, I only see one relay noted in the manual that is designated as '> the Windshield Wiper Hi/Lo, Run/Park relay, there is none for the rear wiper, '> unless the same relay operates wipers on both ends. '> '> Could someone kindly direct me, as to what should I do, in a nutshell, my rear '> wiper motor tests OK, the wiring that connects to the motor, has power on it '> (11.xV) but the wiper does not work. My thought is, the rear wiper relay may be '> bad, but the manual does not show any relay for the rear wiper, only shows for '> the windshield wiper. '> '> Tia '> '> Matt 'i know its only 5 years old but the wires could be broken leadiing from 'body to hatch / tailgate ... i would strip the door cover off and pull 'wires thru and check em under the rubber boot where they bend =====================================================
I checked the wires, good as new. Another interesting thing I noticed. If I check the voltage on the wiper motor connector pins (with digital multimeter), it is 10.65 V when the wiper switch is on and 11.85 V when the wiper switch is off.
I have found relays, there are three of them, wipe up relay, wipe down relay and park relay, I did try to switch them around to see if wiper would work, no luck, did not test the relays as such.
Matt
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