I recently had a new Sony head unit installed in my 98 ram 1500 at best buy. Later I was installing 2 Rockford sub woofers and an Rockford amp. Some where in hooking up the RCA's and the amp remote wire to the back of the head unit I blew a fuse or something. Now my radio, interior lights and dome light are all not working. I have checked the fuses in the dash as well as the ones under the hood and all are still good. Could any one tell me if there is some inline fuse I am missing or something else it could have blown? I don't have a wiring diagram for the truck and best buy kept the one for the head unit.

 

This shouldn't affect your dome lights and stuff... but most aftermarket radios also have a fuse on the unit. Look at thwere the wiring harness comes out of the head unit body. They are usually a blade style fuse.

Check Fuse 12 (10A) in the Junction Block:


Cartman

 

Thanks but I already check the fuse on the stereo and fuse 12 and they are both good.

 

The next fuse you could check further upstream is Fuse 1 (50A). It is in the Power Distribution Center under the hood near the battery. However, if that was blown, I would think you would have more problems than just interior lighting.

All the power to interior lights is through Fuse 12.

You'll probably need to whip out a multimeter and start to check if you are actually getting power to your radio, dome lights, etc.

Cartman

 

Yeh I doubt its that fuse 1 cause every thing but the interior lights and radio works. Nether the radio or lights are getting power.

 

Here is the schematic:


Check Joint Connector 5 (under the steering column). Here is where it is located:


And here is the pinout:


You could also check to see if there is power getting to the socket in Fuse 12. Pull the fuse, and probe each side. One side (the downstream side) should be zero. The other size should be 12V. If not... it means the problem is further upstream. If you do have 12V it will be further downstream.

Cartman

 

Thanks yall sorry I havent been on lately but I fixed the problem. Yall really helped me out im new to this forum but its been really helpful so far.

 

what was the issue and how did you fix it?

 

Niiiice!!! Good way to keeps checking on this thread!!!

 

It was The I.O.D fuse with a black guard on it which by buddy told me he checked but he really didnt because he couldnt get the guard off. The reason it blew is because the idiot that put the radio in at best buy wired the amp remote to one of my tweeters. They refused to give me a wiring diagram and since the radio had just come out that Christmas I could not find one on line. So when I went to hook up the amp remote to the stereo I wired it up to the only lose wire other than the dimmer which I assumed was the amp remote. It was acctually the wire that was supposed to go to my tweeter. Im not to sure how or why but that caused I.O.D. fuse to blow (still not sure what I.O.D stands for).