Rear defrost button

I dont know if its a fuse or not I cant find the fuse number to check it. I looked in the manualand couldnt find it.

Have same issue, when the rear defroster button is pressed, light goes on. As soon as you let go of button, light goes off - the defroster never engages. I've taken the dash apart down to the circuit board - I can bypass the defroster button by shorting the circuit board with a wire - same impact, the light goes on as long as the wire is there but goes out as soon as wire is taken off. Have also checked circuit breaker and no issue found. Seems issue is somewhere else in the circuit - maybe a relay? Can't find any diagnostic information on relays for 2008 caliber - anyone help? THanks.

Ken, no power is getting to the rear grid. I turned the car on, had someone hold down the rear defroster button, and I measured the voltage at the fuse with respect to ground. The terminals at all other fuses had a voltage of 12-14 Volts, whereas the rear defroster fuse was getting zero volts. I used a multimeter to test the resistivity of all of the traces on the back window and they are all fine, on the order of ohms. No voltage is getting to the back window, so I assume that the relay is faulty or there is a bad connector/wire.

Do you have any thoughts on how to proceed from here? Thank you for your help.

The fuse number for the rear defroster is #25 on the Dodge Caliber. It is a 10 Amp fuse.

Ken - Fuse 25 seems to control the rear defroster. In order to test the defroster circuit from TPM to defrost grid, I identified which side of the fuse lead went back to the defroster itself. To power the defroster circuit, I used power from another fuse (12V via a single wire to bring power. This caused the rear defroster to operate (it melted snow) as long as wire attached. So the circuit from TIPM and defroster itself is in good working order. Conclusion seems to be that power TO the TIPM at fuse 25 is lacking (while all other fuses measure a voltage). I'd be willing to change the TIPM but how can I know the TIPM itself is really bad? Any ideas appreciated! Thanks!Ken -

Holding down the switch keeps that amber LED on, but does not provide power to the rear defroster. We pulled off the buttons and dials, and got down to the circuit board. I took a wire and connected the 2 terminals that the button would connect together and the same thing happened. As long as the wire was there, the amber LED was lit (but no power to defroster), but as soon as the wire was removed, the LED turned off.

Ken - are there any tricks I could use to clear codes from the BCM - just to see if some kind of odd or incorrect software issue? Juat to reminde, the defroster circuit works fine when using 12 volts from another circuit. Thanks for any help. Regards, Dan

One other question, is the BCM the same as the TIPM or a separate module? If separate, where is the BCM located? Thanks again.

I have the same car but on mine sometimes the rear defrost amber light engages on its own when I turn my lights on upgraded to hid lights? Can it be the tipm or wires of the hids touching something else they not supposed to? Or when I turn the car and ac of the ac light flicking