rear defogger

[MikeyP]

yeah, he did help out alot. now i just have to go out in the cold freezing wind and look at it.

[Nacho-RT74]

guys what are you talking about what is heating up ?... I can't get it !

rear deffog doesn't heats anything, just blows air to the glass to save from fog inside ( or outside )... takes same cab air, on same temp.

the resistor what controls speed located on blower housing heats on low speed juts because power is going throught, and then the same blower keeps cooler as posible to save from blow, thats all...

switch sends 12 volst on both positions, and then goes or not to resistor depeding if power comes from white or black wire ( low or high speed )

[MikeyP]

yeah, thats what i thought. just regular air from the cab.

[Highway by the Sea]

My rear defogger has a heater coil in it that will heat up if power if applied directly to it.  I thought it was supposed to heat up to melt frost off the rear glass or burn off inside moisture.  It never has though.

[Nacho-RT74]

something like one of these ?:




( not the same but similar )

[Highway by the Sea]

Yes, very much like that.  What is it for if not to heat up when turned on?  My defogger switch (from a 72 charger) had two settings and it would turn on the blower (from a 74 charger) but it would never heat up like that.

[MikeyP]

i thought that was just the resistor for the low setting

[Nacho-RT74]

thats the low speed resistor. Cuts the power when 12 volts comes from switch on LOW speed to get the proper voltage to teh blower and get LOW speed. Is not a heater coil

as stated, from switch arrives 12 volts on both speeds, then when arrives to blower, takes power directly from wire or coming throught resistor

Is inside the blower housing just because ( like on front A/C-Heater box ) blower will keep the resistor cold at the same time is working and feeding the blower

[Highway by the Sea]

It may very well be.  I am not an expert on this sort of thing.  It sure heated up like a heater coil when I applied 12 volts DC to it!  I am glad to now know that my rear defogger (a junkyard find) is apparently not broken after all!  But it has never done a good job of defogging my rear window either.  Nacho says that it is a resistor and I believe him.

[Nacho-RT74]

of course the coil gets hot when power goes throught, but then that's the reason to be inside the blower housing... keep it cold for a while blower is working, saving from coil melt.

[MikeyP]

that good and everything, but i have another problem  today after work i got into my car and went to start it and.... Nothing i tryed neutral i tried park, i tried every postion and nothing. so i had to start it with the handy dandy srew driver trick. so is it my neutral safty swith or what??? P.S electrical sucks. lol

[Nacho-RT74]

-damaged brown wire on tranny harness.
-Unplugged or loosen NSS
-Tranny link out of adjustment.
-NSS damaged
-Starter Relay Damaged

[MikeyP]

yeah, how do you adjust the tranny linkage anyway? because when i'm in drive it is in between D and 2 and i can't lock it in first. don't you like how this went from a rear defogger to this? LOL all i have to say are you guys are realy helpful

[Nacho-RT74]

down the driver floor pan, will find the linkage adjustment

[MikeyP]

i know where it is at. i just don't know which way to adjust it. i went though 3 904's and i finally got a 727 and it's the only one that has held together for at least a month 

[Nacho-RT74]

take it to the top end on shifter ( P ) then loose the adjustment bolt... be sure tranny lever get to top too, and then tight the bolt

[MikeyP]

oh, thats it?? thats to easy.

[Nacho-RT74]

that's how I have made Dunno if there is some other MORE SCIENTIFIC way . Oftenly needs some MINIMAL extra adjustement back and forth to get the proper P and N ground due the worn parts around and VOILÁ.

with adjustment bolt loosen you can feel the steps on tranny lever, and simply try to match with shifter.

Once I simply put a tester over windshield on starter relay brown wire to check for ground continuity when I was shifting to be sure everything was done.

[MikeyP]

i'll have to try that tommorow. so on my to do list so far is:
-fix linkage
-check NSS
-find out why i keep blowing the gauge cluster fuse
-try out my new exhuast dumps 
-fix rear defogger
-flush Cadillac motor
-redo the head gaskets on my cadillac for the 3rd time

i think i have some work for me to do. LOL

[Ghoste]

Nuthin' like keeping your plate full.  Just remember it's a hobby and if you keep on telling yourself, "it's therapeutic, it's therapeutic, it's therapeutic" over and over, eventually you'll come to believe it.  That or you'll grow slowly insane like the rest of us. 

[MikeyP]

i think i'm already insane. thats what most of my friends say anyway. they are always like " you should sell you two pieces and get a newwer reliable car that get at least 20 MPG" i think i'm going to have to  sell one of them though because i need money, but i love them both. AGHHHH, what to do

[Highway by the Sea]

My rear defogger switch illumination light no longer works (73 Plymouth Satellite). I cannot figure out why.  I have ordered a NOS switch to replace my broken one and I hope to have this working by the time it arrives.  Any ideas?  I have replaced the bulb already, but no good!

[Nacho-RT74]

did you check for propper wire plug on orange rubber source ?

ground on dash ? switch assembly needs to be tight on dash to get the ground once bulb is inside the housing

[Highway by the Sea]

I checked both, even bypassing the normal ground, but nothing worked.  It used to work fine.    I did not find a blown fuse either.    Is this hooked up to the middle console gear shift light?  The wire to mine is disconnected and I cannot reattach it until the dash cluster is removed to fix my speedo.

[Nacho-RT74]

Is hooked at the same place where the console shifter light wire it is, orange feed around A/C control area, but each one has its own plug, bullet male terminal.

Console shifter light has an intermediate plug, spade kind on passenger kick panel area, or very close down the carpet.

If you have lights on cluster, is not a fuse problem.