J30 electrical problems

[phoynak]

I changed the light bulbs in map light on my 1993 J30. After I did that they worked for like a minute then nothing. Now my dome light won't work. When I first start the car the wipers go off once then stop. If I have the trunk open the keychain door lock will not work. If the trunk if closed then the alarm and doors lock fine. I took the bulbs out and still have the problem. I even removed the entire assembly (the power sun roof) and still have the same problems. Also the door ajar light would come on when I turned on the map light. That stopped but sometimes the door ajar light comes on for a few secs when I start the car.


Does anyone know what is wrong? Is it a fuse going bad? Or a fuseable link? It is more of a pain since I have no dome light at night but I dont want the problem to grow.

[Speedy_1234]

what it could be is you have a shorted in your car mabye a ground is touching power meaning postive

[Nahkapohjola]

Whatever you might do wrong with the map light does not cripple your car...

11 year old car connections are mostly oxidized. This means problems are juts waiting to pop in. That is why people buy new...

First thing with such a nice machine (I've got one) is to work around all wirings. Take out every (=every) connector everywhere, inspect, clean, add VERY small drop connector greaze. All small ctrl tubings under the hood: take off, cut 1/4" off, insert. This is quite a job, takes one-two days but is worth it.

Check/clean the fuse panel slots with inserting hard carboard in each slot, replace all fuses (some very nasty intermittent problems with 'hollywood' fuses...).

Now electrical contact problems will be a distant memory. Except electronics which I doubt in this case...

[94J30t]

Originally Posted by Nahkapohjola

Whatever you might do wrong with the map light does not cripple your car...

im gonna have to call bs on this one. any short to ground form a power wires has potential to screw up any electrical componant that needs ground. the whole point of grounds are to send the ground side of your componants to a common conductor which inturn connects them to the negative terminal of your battery completing every electrical circuit of you car. now take away power to a switched wires that feed numerous circuits by toughin ground before it gets to the componant (electricty takes the path of least resistance) and you have an electrical nightmare that can effect anything up to the PCM. You PCM controls your ground to componants (i.e. solenoids, acuators...). a good example is fuel injectors, you fuel injectors constantly have power, when the engine is in the "on" position there is always the source voltage going to them. what opens and closes the actuators is thecircuit being opened and closed by the PCM. then the injector needs to open the PCM closes the circuit and supplies it with ground allowing it to function, when the injector is done it open the circuit and eliminates the gorund and flow of electricity. so if you short to power on critical wires or your serial or parallel wires to the PCM than you now have a car that performs functions that are supposed to be operator controlled on its own.

just my 2 cents, not trying to dog you in anyway but dont taek wild guesses at things if you really dont know what is going on

[Nahkapohjola]

"...im gonna have to call bs on this one. "

- Today too many rely on "call bs" fortune telling instead of Truth.

- Here the Truth is found in the schematics. Like just about any electrical circuit...

- Basic lamp wirings should not be confused to electronics. Shorted wires [if fusepanel has melted] might however stink of bs.

- Map lamp wirings goes to a fuse in any car. Short circuiting it blows its fuse, not bs fuses. That is all. Sorry about that...

- Make an empirical test - and "call bs" is revealed!

- Dimmers have a dimmer circuit, some types of them can be burn ed with a short.

- The whole car can surely be burned. But. It Is a Separate question -like glob all war ming muppet show...

"just my 1 cents, not trying to dog you in anyway but dont taek wild guesses at things if you really dont know what is going on"

[Speedy_1234]

Well What do you know about this car the J-30

[94J30t]

Originally Posted by Nahkapohjola

- Map lamp wirings goes to a fuse in any car. Short circuiting it blows its fuse, not bs fuses. That is all. Sorry about that...

um ok yea...ever got the memo on the fact that fuses also have to have input power to supply power to the protected circuit? well captain obvious, if you have a short before the fuse panel to anything than WOW you do not blow a fuse and you do give excess power to the chasis ground or any wire possibly not needing additional power.

also if you short to a wire that has a high resistance that you wont supply the additional current to blow a fuse and you will be giving current from one wire to another that possibly has lower current, therefore blowing that fuse but still suppling it power. it also may be a wires to a componant after a switch, if the switch is closed (i.e. wiper motors turning on during start) than you dont send your current to the fuse cause there no damn completted circuit in that direction of the circuit.

i am going to stop goin on cause youll come up with some retarted comment trying to defend yourself and your pride not realizing that you really dont know much about what you are argueing about, where did you learn this stuff anyway??

[can-chi-suk]

Speaking of obvious did you read the original post? Is the bulb in the map light Before or after the fuse? I can't imagine how just changing the bulb could cause a short in wires that are nowhere near it. Maybe I just have a poor imagination.
P.S. Sorry, I know this doesn't contribute anything new to the topic but it bugs me when people comment on something without thinking about it.

[Nahkapohjola]

Originally Posted by can-chi-suk

P.S. Sorry, I know this doesn't contribute anything new to the topic but it bugs me when people comment on something without thinking about it.

Speaking of obvious did you read the original post? Is the bulb in the map light Before or after the fuse? I can't imagine how just changing the bulb could cause a short in wires that are nowhere near it.

=why repeat the facts above...?

Maybe u just have a poor imagination.

P.S. Sorry, I know this doesn't contribute anything new to the topic but it bugs me when people comment on something without thinking about it. Rili.

[can-chi-suk]

Oops, I keep forgetting that regular sarcasm is nearly impossible to detect in text.
To clarify my previous post was directed toward 94J30t's post, as an attempt to agree with Nahkapohjola's initial response.
Sorry for not mentioning that in the first place. There should be a better emoticon or some vb code tags for indicating a sarcastic tone. The rollin eyes just don't seem to be strong enough.