rear defogger

[MikeyP]

on my 73 charger my rear defogger just quit running and the fuse is good and all the wires are good. is there something i'm missing??

[Ghoste]

The relay?

[MikeyP]

where is te relay at then? i stole it out of a 72 charger and put it in my self and i don't remeber a relay

[Nacho-RT74]

no relay, is just a direct wire run.

I just can say check on tipical places:

fuse.
Accesories source ( could it be accidentally unplugged )
loosen plugs at switch, kick panel area and motor.
Damaged resistance
Damaged motor

[Ghoste]

My thinking was screwed up on this one.  I was thinking of the more modern type with the timer and everything in it but you don't have all of that stuff do you?

[MikeyP]

thats what i thought. then why wouldn't it be working ?? it was working one morning when i drove it to school and the next morning it wouldn't work. do they burn up easliy or something??

[MikeyP]

i don't know. but also lately i've been haveing an overchargering problem and i changed the regulator and it was still overcharging. but it only happens when i'm driving it. AGHHHHHH Mopars. lol

[Ghoste]

Man I don't know.  I think there's a resistance cable in there, could it have burned up?

[Nacho-RT74]

thats what i thought. then why wouldn't it be working ?? it was working one morning when i drove it to school and the next morning it wouldn't work. do they burn up easliy or something??

well being ther are sold PRETTY CHEAP I don't think they burn easy, since there is no market pushig out for them.

Overcharging ?... is the amm needle playing fun on ammeter or is ALLWAYS on charge side ?

[MikeyP]

the volt meter i put on it along time ago keeps spiking out at 17 volts but my fuse keeps blowing for the ammeter and the rest of the gauges.

[Nacho-RT74]

Man I don't know.  I think there's a reistance cable in there, could it have burned up?

resistance is attached on blower housing

[MikeyP]

i'll have to just trace the wire all the way back... wait. i haven't checked the place where it pluges into the wireing harness under the dash. i'll have to look at the .. if i can find it in the rats nest i have under there. lol

[Nacho-RT74]

the volt meter i put on it along time ago keeps spiking out at 17 volts but my fuse keeps blowing for the ammeter and the rest of the gauges.

ammeter doesn't have fuse, just the fuse link on starter relay.

rest of gauges do have the fuse, but fuse is feeding really the cluster voltage limiter

Fuses on fuse block doesn't blow because you have extrapower coming from alt, they blow because devices ask for more juice than fuse resist. let's try to rememeber amperes are not just given by alt/batt, they are given if devices need.

let's take an example. Maybe you have a 600 amperes batt however you are running devices that barelly use 20 amperes. Batt DOESN'T SEND 600 AMPERES, are the devices what uses just what they need... 5, 15, 8, 10, 20 or whatever amperes

[Nacho-RT74]

i'll have to just trace the wire all the way back... wait. i haven't checked the place where it pluges into the wireing harness under the dash. i'll have to look at the .. if i can find it in the rats nest i have under there. lol

is easy to locate... around the pigtail runing to ignition switch ( close to radio ). Is a Yellow rubber source to fit 3 bullet terminals.

Just a question. Is Standart cluster or Rallye cluster ?

[MikeyP]

yeah your right it was my coolant temp gauge i was thinking of. but why does it keep blwing?? it just started doing that like two days ago and the only thing i did to the car recently was put headers on it.

[MikeyP]

it's a rallye from a 72

[Nacho-RT74]

yeah your right it was my coolant temp gauge i was thinking of. but why does it keep blwing?? it just started doing that like two days ago and the only thing i did to the car recently was put headers on it.

lets' forgett by the moments of the voltimeter...
do you have ammeter hooked ? is playing fun or keep on charging side.

halogen beams ?

Rallye cluster ... mmmm I though it could be standart and maybe more relationship with alt, regulator and fuse ( gauges are on same line on standart cluster )...

anyway.. alt need to be checked... also blue line from ignition switch up to ballast/regulator/electric choke ( if equiped )/alt brush.

I'm thinking on a short somewhere on blue line or inside alt.

Or maybe cluster voltage limiter shorted

[MikeyP]

the ammeter peaks out with the voltimeter and i have halogen on my high beams, not for sure about the lows. the car origanaly had a standard but i pulled out the whole dash and swicthed the gauges and harness with the 72's. and i'lll have to check the blue wire because i hde to replace it before and my connetions might be bad

[Nacho-RT74]

ok. you could have TWO or THREE diff problems somehow relationed.

check for plugs and conections everywhere. Clean and tight!!!... is not a GREAT AND EASY job to do, but is better and safe to do it. You can start on basic lines at bulkhead conector

just a read to let you know:
http://www.dodgecharger.com/forum/index.php/topic,33574.0.html

that info is MY suggestion, based on MaMopar extra wiring made to tow packaged cars with more than 60 amps alts and making the explanation about WHY by myself... there is more options around.

with 60 amp alt you will have ON THE LINE of overheat original charging line, specially with that ammeter playing and halogen beam relay mostly sure hooked to batt. Rust and dust helps on that.

You can get overheat and weird electrical stuff also with dirty/loosen/rusty lines, not just because extra alt load

[MikeyP]

so i'm sure it doesn't help it any that i have one those powermaster 75 amp alt.? but yeah, my engine wiring harness is a mess. the guy i bought it from like 5 years ago( yes i was 12 when i got it ) had it butchered. there are wires that go nowere but they're not hurting any thing so i don't mess with them.

[Nacho-RT74]

yeah, sure does help!!! if you have a PERFECT wiring... check the link!!!

[MikeyP]

ok, so the bigger alt helps keep things going at idle. but what is making it overcharge??? that link kindda makes some sense.

[Highway by the Sea]

Mikey, I have one of those on my 73 Plymouth that I stole out of a 74 Charger, and get this!  Mine will blow, but will not heat up when shut on!  The only time the heater coils will heat up is if I apply a power source directly to them without using the shut off switch.  Perhaps that switch is your problem too.

[MikeyP]

i didn't know it heated up. i thought it just blew air on it. also i keep blowing the fuse to my fuel and coolent temp gauge and i can't figure it out.

[Ghoste]

Hmmm, I'll bet you'll find they're related problems.  I think Nacho was leading you to the right answers.