Bronco Dee

The radio fuse is constantly blowing and we have replaced it multiple
times. The first time I ever noticed it was when I hit a dip in the road.
Is this a fairly common problem? If not, I'll just pull the radio out to
try and locate a shorted wire. Also, any special trick to removing the
radio?

Thanks!

TR7 Driver

I had a similar problem with a 1988 Dodge Diplomat. Turned out to be a short
(pinched wire) in the dome light! That light and the radio were on the same
fuse. Also this defect was highly intermittent. It would be fine for weeks at
a time and then would pop the fuse 5 - 6 times in a row. Here's how I located
the problem.

Wire in an 1157 bulb in place of the fuse. If it glows brightly there is a
short circuit. Tap around the dash board, the ceiling, the door panels, etc.
When the light goes out
you know you're in the area of the short.

This is not guaranteed to work in all cases but should be an aid in finding a
short circuit in the car's wiring. I assume you've already disconnected the
power feed to the radio; thus eliminating the possibility that the radio itself
is causing the problem.

hyundaitech

Is this the constant power fuse, the switched power fuse, or the fuse in
the back of the radio?

Bronco Dee

This is the fuse in the fuse panel. It's the little 10 amp fuse.

hyundaitech

There are two 10A fuses in the fuse box which control the radio.

One is the constant power fuse which also provides power to the keyless
entry control module, the power antenna, the clock, the cluster, and the
A/C control head. If this is the blown fuse, it could be caused by any of
these items or a pinched wire, or the radio.

The other fuse is the switched power to the radio which provides power to
the radio only. Blowing this fuse would be caused by a pinched wire or
the radio.

You can check the schematics yourself at www.hmaservice.com. Select
"Service Information," "Web Tech," and ETM and then put in your vehicle
information. If the fuse is only blowing intermittently and you are
having difficulty understanding which fuse has what purpose, then this may
be a job best left to a professional. The next step in determining what
is causing a fuse to blow intermittently when it powers numerous items is
to wire in-line fuses to each of the items and see which fuse blows. This
narrowing process can continue for quite some time.