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1999 Toyota Camry

Tiny
A_DAVID30
  • MEMBER
  • 1999 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 105,200 MILES
Hi

I have a Toyota Camry LE 1999 with 105200 miles on it. When I turn on the rear defroster, my lights go dim and the heater works weakly. My mechanic tested the alternator and he told me that it works fine. I also replaced the alternator belt. My battery is ok however it is not very new. I got it about 2 years ago. Would you please give me some advice?

Thank you very much
David
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Thursday, January 3rd, 2008 AT 3:31 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

looking at the wiring diagram of the rear defog system there are a number of diodes in the defog switch assembly, which if are defective may back feed an earth to the heater and lights. I would have a tech check this out before purchasing a new switch, I can see how it may affect it in theory, but it's always good practice to test first, I feel that the switch may not be cheap. If my theory is correct and you have mirror heaters as well, they may also be affected.

Mark (mhpautos)
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Friday, January 4th, 2008 AT 6:52 AM

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