Three fuses blown, why?

[jacen2912]

Alright, I'm having the issue looked at tonight, but maybe you guys can provide some quicker resolutions.

Here's the situation:
-New headunit installed two weeks ago, it's a Pioneer DEH-P6000UB. Installed without a hitch, have had no problems since that day.
-Went to a junkyard this past Tuesday and grabbed a few new things (the list includes tail lights and a din-sized cubby hole, with a door, as well as a new moonroof switch, since mine stopped working three months ago) and installed all of them.

Thursday night I decided to start taking my cover off and just temporarily plugging the switch in enough to operate it, leaving the old one unplugged, then putting the panel back up when I was done opening and/or closing the moon roof with the old switch still unplugged. Well, Thursday night I blew a fuse. Conveniently my friend Nick was there with a ton of spare 15 fuses, so I popped one in. Sweet, I have to reprogram my radio and clock, but it works whatever, Spend 10 minutes doing that, and head home. Halfway home, the fuse blows again. Whatever, I drive in silence until this morning, when I take my moon roof switch panel completely off and properly glue and mount and plug in the new switch, and completely properly reassemble it. Then I put a new fuse in, and drive it for about 35 seconds and the fuse blows again.

Now I had assumed that, because I wasn't appropriately putting the plug in within the moonroof switch panel, it, or something to do with it, was grounding out and hence I left the fuse out so as nnot to burn or damage something, but now that everything is back to normal, what am I missing?

 

[Kens1992mtxSHO]

Are you sure the radio is not the source of your problem? I would check for exposed wires somewhere.

 

[hawkeye18]

Disconnect the switch and drive around. If the fuse doesn't blow, then the switch is your problem.

They can, and will, short internally with no external evidence.

 

[jacen2912]

switch disconnected, fuse didnt last more than about 15 seconds this time. we even unloaded that circuit of the radio (running to the ignition now), so im just outright confused.

 

[Kens1992mtxSHO]

Maybe put a bigger fuse in?

 

[Racer X]

Maybe put a bigger fuse in?

No, Darwin, this is not the answer.

You've got a short somewhere. I'd start by disconnecting all the devices on the circuit, and reconnecting them one by one until you pop the fuse. Once you've ID'd the problem device, go from there.

Do not put in a larger fuse unless you're trying to collect insurance from the resulting fire that will ensue.

 

[Kens1992mtxSHO]

Only reason I suggested this was because I once put in an aftermarket stereo and had the same problem. Never had it before, double checked all circuits/wires and kept tripping the 15A fuse. I put a 20A fuse in and never had the problem again and no fires as a result.

 

[Racer X]

Right, but you assuming the same here. Putting in a larger fuse on a circuit that wasn't designed to run at that amperage is a potential recepie for disaster.

 

[jacen2912]

Only reason I suggested this was because I once put in an aftermarket stereo and had the same problem. Never had it before, double checked all circuits/wires and kept tripping the 15A fuse. I put a 20A fuse in and never had the problem again and no fires as a result.

Id try that normally, but the radio isnt on that circuit anymore, it's now on the ignition circuit, and it's working beautifully.

Does this mean my only option is to go through and disconnect every single interior light, somehow unplug my keyless entry system, and my clock, and replug them all back in just to find this?

 

[Kens1992mtxSHO]

That's exactly what you have to do. You have to single out the one thing that is shorting and blowing the fuse.

 

[haydenkayne]

if your radio is on a seperate circuit now, try putting a 15 amp circuit breaker in instead of a fuse, this way while your trying to trouble shoot you wont to keep popping fuses in and out