Radio clock display and horn don't work

There are 3 fuses that control the radio. fuse 18, fuse 13 and fuse 2. fuse

14 is for the radio. they do not share the same fuses or the same ground. if the only thing that goes out in the radio is the clock or the clock display and the rest of the radio works your problem is in the radio and more then likely the horn is a seperate issue. Thats my opinion without seeing the vehicle. who replaced the radio? Dealer?. I will not be here after Friday to reply back. I will be back a week after.

Glenn Beasley Chrysler Tech

From what you say I would reach that same conclusion.

I've solved similar problems by spending a few hours pouring over the wiring diagrams in my maintenance manual.

Dealer did the radio change and problem still persists. There is definetly a shared connection between the horn and radio display.I have watched this event for months to have come to this conclusion.I wish I had the talent to understand the wiring system on the repair manual.

I agree that the two are connected since they always occur together.

The only feasible way to get it troubleshot is to find someone who can read the schematics and has some troubleshooting skills. If I had access to the PT schematics, I'd take a look, but I don't.

The LH cars have the power amplifier and horn relay powered by the same fuse - obviously not the same vehicle, but not surprising if the same power system design philosophy was used - definitely worth a check.

If it's not a common wiring issue, then a module - probably BCM is bad or in need of re-flashing.

Have you tried disconnecting battery to reset the BCM?

***If my hunch about common power to the amplifier and horn relay is correct, that's the most likely cause.***

Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')

Hi...

Not a mechanic, just an old long retired electrical guy, but a thought if I may?

Don't know PT's; never ever even ridden in one, but...

I'm wondering if the commonality here might not be the theft protection system? If I "steal" or tamper with the radio, does it or does it not cause the horn to sound intermittently?

If so, it will surely be using a relay to do so, and that relay will be interrupting the regular horn circuit.

If I were to bet on the solution, I'd be willing to bet a dollar to a donut on the radio being the problem. Seeing as the radio's been replaced, I'd be looking at the radio wiring. I suspect I'd even invest a few minutes in unplugging the radio connectors, spray a little contact cleaner on the blades, and plugging/unplugging them several times to clean them up a bit.

Just my two cents.

Take care.

Ken

Definitely worth considering.

Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')

I thank you guys so much for sharing my pains. During the weekend, I did a little bit of fiddling with the car,trying to trace the connection between the horn and radio and in the process I stumbled partially into the cause of the problem. I disengaged the steering coloum lever and moved steering up and down to view cable and discovered that with each movement, the display on the radio comes on and off.I selected a position that kept the display on and found the horn was also working and has been working since then.The problem is definetely a partial contact at the the steering neck. The problem is still there and I suppose that I have a temporal reprieve since I could not identify which cables are responsible for this.

Does your PT by chance have radio controls in the steering wheel? If so, one common thread may be the controls return wire for the horn and radio thru the clockspring.

Bill Putney (To reply by e-mail, replace the last letter of the alphabet in my address with the letter 'x')