[HUMMER H1]

on my 89 rover front wind shield heater doesnt work.
in front it looks like 2 separate switches for the rear and front heaters em i right?
and if yes when i press the one that should be front heater something clicks under the passenger seat but heater doesn't wanna work

what could be the problem?

thank you.

ERIC

 

[RRToadHall]

have you made sure it is hooked up at the glass? Have you checked the grounds?

 

[HUMMER H1]

have you made sure it is hooked up at the glass? Have you checked the grounds?

yes it is hooked up at the glass.

if i use volt meter at the connection on the glass there should be voltage right?

 

[Danny]

Is the engine running? I believe they only work with the engine running - at least mine does.

 

[HUMMER H1]

Is the engine running? I believe they only work with the engine running - at least mine does.

YES ENGINE RUNNING. I TOOK HER TO PLAY IN THE SNOW AND WIND SHIELD KEPT GETTING FOGY EVERY 2 MIN.

HOW LONG DOES IT TAKE TIL YOU SEE IT WORK? 2 MIN. OR MORE?

 

[HUMMER H1]

///////////////////////

 

[rodrevolver]

G'day,

As I don't have this feature..... :shock: :thumb:

My first test would be to see if I had continuity in the screen element, so using your multimeter - check for a resistance.
Disconnect both power feeds from the connectors, then create a temp extension on one of the meter probes so that you can reach/connect one probe to each of the element connectors.
Any positive reaction will do - this will verify that the element is not broken.
As with a light globe - no reaction is a bad sign....... this test is true for the rear screen as well.

Second - have you checked the fuse/s.... ?

Cheers
Rod

 

[rtkraken]

Mine's been jacked for years. There's a special timed relay that runs the whole thing. Apparently the weak point in the device is the timer and when they go the device turns on briefly (clunk), then shuts off a couple seconds later. The device is a little spendy and I've manged to avoid replacing it. But, I believe they're still available. Mine ran in Maine for years without much issue. The dash defrost vents put enough hot air up there to fend off the ice. Are your vents working?

 

[classicjack]

Where'd you find snow in Cal this early in the season, it looks good, cant wait for snow here in Western Pa. Theres a relay on the steering column,if you remove shroud under steering wheel and put your hand on relay area as someone presses switch you'll feel it clicking, there are 10 relays up there so you have to try it a few times until you touch the right one. I use this method because the workshop manual is dificult to understand on which is which. This is a time delay system and uses a relay to turn it off after 10 min or so, rear will stay on until you turn it off. you can use a standard relay to troubleshoot .

 

[rtkraken]

Yeah, Classic Jack's on it. It's been a while, but I seem to remember the seperate timer relay to be hiding behind the passenger footwell side panel. The relay locations tend to be year specific.

 

[HUMMER H1]

Mine's been jacked for years. There's a special timed relay that runs the whole thing. Apparently the weak point in the device is the timer and when they go the device turns on briefly (clunk), then shuts off a couple seconds later. The device is a little spendy and I've manged to avoid replacing it. But, I believe they're still available. Mine ran in Maine for years without much issue. The dash defrost vents put enough hot air up there to fend off the ice. Are your vents working?

i tried everything except the relays. so today i am gonna try that hopefully it will fix the problem . thank you.

 

[HUMMER H1]

Where'd you find snow in Cal this early in the season, it looks good, cant wait for snow here in Western Pa. Theres a relay on the steering column,if you remove shroud under steering wheel and put your hand on relay area as someone presses switch you'll feel it clicking, there are 10 relays up there so you have to try it a few times until you touch the right one. I use this method because the workshop manual is dificult to understand on which is which. This is a time delay system and uses a relay to turn it off after 10 min or so, rear will stay on until you turn it off. you can use a standard relay to troubleshoot .

guess what its snowing today again. and its only 15 miles from down town LA. ( LOL ITS GLOBAL WARMING OR COOLING )

( i came across those bear prints it was very fresh )