fuse keeps blowing on heated rear screen... what to check?

[boneybradley]

Well I have a small issue with my heated rear screen, it keeps blowing the fuse. I have changed the switch for one I know is fine and checked the wiring (as much as possible)

Are there any other things to check?

I am guessing the earth but I don't know where that is located, and what do i need to check, also it's possible i have a faulty heated mirror which i guess would cause the same fuse blow as they share the circuit?

any advice welcomed

[WeekendMechanic]

Did you check the wires in the rubber bellow, could be touching to an earth wire causing the short circuit....

[javalin]

check the resitance across the heating element, then you can calculate the load (amps) and that might explain the blowing fuses.  Does it blow instantly when turned on, or after a while?

[boneybradley]

check the resitance across the heating element, then you can calculate the load (amps) and that might explain the blowing fuses.  Does it blow instantly when turned on, or after a while?

it's hard to say, I think it blows with the ignition? (It was fine until i restarted the engine... I think?)

I will check resitance this weekend, I am also going to unplus it and see if the mirrors blow it?

[javalin]

yeah check anything else on that fuse too.

[Bellend]

Does it blow with switch off and ignition on?

[boneybradley]

Does it blow with switch off and ignition on?

I will check that when I get some new fuses this weekend! i think it's only when the switch is turned on and ignition is initially turned on (it seems to be fine other times?)