Rear demister problem

JACK2133

MEMBER
ISUZU

1988 2.6 LWB petrol.I have had it since new now with 90000 miles on the clock. It now only does about 2500 miles a year and is carefully maintained. However the heated rear window is not doing its job and only clears the lower section-and that not very well! It has never functioned properly.I have tested it and there is current flowing along all of the "fillaments" but only the lower ones feel warm. My son in law reckons it is a relay problem and there are not enough amps going through although the voltage is there. Can that be so?

2 Replies

2CARPRO JACK

MECHANIC
11,533 POSTS

Sounds like the filaments are having a problem, if part works but part doesnt and there is voltage I would go to the window its self

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Thursday, February 2nd, 2006 AT 3:28 PM

JACK2133

MEMBER
4 POSTS

Thanks for your reply. When you say the problem could be the window are you saying it is the wrong type of glass for the filaments. Perhaps too thick for the voltage to heat up?