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Rear window demister stopped working. Fuse is fine. Any other suggestions?
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The element in the window can fail, see if you are getting 12V across the terminals on the window with the ignition and rear defog switch on.
If yes, then that's you problem
If no, you have a problem somewhere from the fuse to the window so check for power at the switch and go either way from there.
Edit: Don't have a 90 wiring diagram but the 120 version also has a Defogger Relay that provides power to the fuse and this is also listed as the R4 relay at the back of the 90 passenger compartment fuse box Fuse Box Diagram Toyota Land Cruiser Prado 90 (1996-2002) (fuse-box.info) so may also be worth checking for 12V at that point.Last edited by ptommo59; 02-06-2023, 11:17 PM.
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Originally posted by ptommo59 View PostThe element in the window can fail, see if you are getting 12V across the terminals on the window with the ignition and rear defog switch on.
If yes, then that's you problem
If no, you have a problem somewhere from the fuse to the window so check for power at the switch and go either way from there.
Edit: Don't have a 90 wiring diagram but the 120 version also has a Defogger Relay that provides power to the fuse and this is also listed as the R4 relay at the back of the 90 passenger compartment fuse box Fuse Box Diagram Toyota Land Cruiser Prado 90 (1996-2002) (fuse-box.info) so may also be worth checking for 12V at that point.
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