does anybody know why or what causes.....
Thread Starter
TECH Veteran
Joined: Feb 2002
Posts: 4,049
Likes: 2
From: Loganville, GA
does anybody know why or what causes..... (not sure if this is the right room for this)
Why the rear defroster will shut off prematurely? and it also causes the power seat on the drivers side functions not to work either? you cant turn it on for a few minutes or move the seat? then it will work again for a short time. My 00' T/A has had this prob for a while and now my 99' T/A is doing it? I tried swapping the circuit breaker in the fuse panel but it still does it?
any ideas???? <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" />
Why the rear defroster will shut off prematurely? and it also causes the power seat on the drivers side functions not to work either? you cant turn it on for a few minutes or move the seat? then it will work again for a short time. My 00' T/A has had this prob for a while and now my 99' T/A is doing it? I tried swapping the circuit breaker in the fuse panel but it still does it?
any ideas???? <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" />
TECH Apprentice
iTrader: (168)
Joined: Jul 2002
Posts: 359
Likes: 0
From: Chicago Far Far South Subs
Re: does anybody know why or what causes..... I have a 00 WS6 with the same (exact) problem!
I just switched the breakers earlier today and it seems to stay on, but the breaker gets so hot you cant touch it!
I have checked all connections to no avail.
Have you found a cure yet?
I will let you know what I find when I do.
Dave
I just switched the breakers earlier today and it seems to stay on, but the breaker gets so hot you cant touch it!
I have checked all connections to no avail.
Have you found a cure yet?
I will let you know what I find when I do.
Dave
TECH Apprentice
iTrader: (168)
Joined: Jul 2002
Posts: 359
Likes: 0
From: Chicago Far Far South Subs
Re: does anybody know why or what causes..... I got it!
I put a 30 amp fuse in instead of the 30 amp breaker.
I then put a DC amp meter on the line at the fuse and it shows 24 amps. I now know that the system is ok because after checking I let it go through its 10 min run time and the amps never went over 25. Yes it ran its full 10 min!!!!
The 30 amp breakers dont seem to run to good for this defroster??? It says Wagner on the breaker so I doubt if its factory so I will try a factory 30 amper one.
Meanwhile the 30 amp fuse works well and yes it does share the circuit with the electric seats.
I put a 30 amp fuse in instead of the 30 amp breaker.
I then put a DC amp meter on the line at the fuse and it shows 24 amps. I now know that the system is ok because after checking I let it go through its 10 min run time and the amps never went over 25. Yes it ran its full 10 min!!!!
The 30 amp breakers dont seem to run to good for this defroster??? It says Wagner on the breaker so I doubt if its factory so I will try a factory 30 amper one.
Meanwhile the 30 amp fuse works well and yes it does share the circuit with the electric seats.
Re: does anybody know why or what causes..... Most small circuit breakers work
on a thermal mechanism - basically
a small heating resistance and a
thermostat, in a controlled thermal
impedance casing. So, if you're
operating near the trip point, you
are throwing some heat (just not
quite enough to snap the bimetal
spring over).
Circuit breakers in confined spaces
may trip at less than their free-air
rating, because the power can keep
driving the temperature up when there's
no good heat dissipating air circulation.
on a thermal mechanism - basically
a small heating resistance and a
thermostat, in a controlled thermal
impedance casing. So, if you're
operating near the trip point, you
are throwing some heat (just not
quite enough to snap the bimetal
spring over).
Circuit breakers in confined spaces
may trip at less than their free-air
rating, because the power can keep
driving the temperature up when there's
no good heat dissipating air circulation.
Re: does anybody know why or what causes..... I had the same problem with my 98 SS. Didn't know what to do for a long time. Replaced the breaker with a fuse of the same rating and it has been perfect ever since. Don't know if a new breaker would work or not. Original breaker is a Wagner. I tried switching it with the breaker right next to it (also a Wagner)but it didn't work any better. Maybe the original Wagner breakers are bad. The fuse in place of the breaker works great.
