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gweedo295 · 07-30-2021, 03:58 AM

Hello all, 07 HR radio display stays on. Just the light with no digital display. The power button does nothing n the dash radio power switch does nothing, doesn’t even light up when pressed. Fuses r good. Thinking the unit took a turn for the worse.

Anyone experience this issue. Anyone replace theirs with an upgrade that works with the coach wiring or, know of a place to get a replacement or refurbished etc.

Thanks, Guido

MrMark52 · 07-30-2021, 05:01 AM

Some automotive radios have an extra wire for display backlighting that is supposed to be wired to the headlight switch. It’s kind of sounding like the installers were lazy and just hooked that wire to the 12vdc input power to the radio (assuming the radio isn’t switched with the ignition key - if so, the backlight would go on and off with the ignition key).

gweedo295 · 07-31-2021, 05:22 AM

Funny u mentioned the headlight switch. On our last trip I noticed the headlight brights came n and stayed on after I used the steering wheel switch to flash a trucker, I turned the headlight on and then off n the brights went off, but then the brights came back on several times. It did that a couple times. I thought maybe the headlight switch was going bad. However, even after turning the lights on n off the radio display stays on.

Funny that the radio main dash switch for power doesn’t light up. Wondering too if perhaps the power switch is bad sending it power, but I don’t know because the radio power switch doesn’t do anything.

MrMark52 · 07-31-2021, 09:27 AM

Quote:

Originally Posted by gweedo295

Funny u mentioned the headlight switch. On our last trip I noticed the headlight brights came n and stayed on after I used the steering wheel switch to flash a trucker, I turned the headlight on and then off n the brights went off, but then the brights came back on several times. It did that a couple times. I thought maybe the headlight switch was going bad. However, even after turning the lights on n off the radio display stays on.

Funny that the radio main dash switch for power doesn’t light up. Wondering too if perhaps the power switch is bad sending it power, but I don’t know because the radio power switch doesn’t do anything.

Mmmm - I don’t know that what you describe with the headlight switch is related to the radio backlight remaining on - it could be, or it could be coincidental.

Some chassis use a relay to actually power the headlights so that would require investigation. Seems I read somewhere that Workhorse initially routed headlight current through the actual turn signal activated bright/dim switch which led to premature switch failure. A work-around has been figured out where a relay was added.

But you did trigger a thought - have you confirmed that your dash light dimmer isn’t locked to the “always on” position?

And - my initial thought still stands that the installer may have wired the radio backlight to the same 12v power wire as the radio uses. That wire would always be hot as the radio on/off would control the radio, but have no control of the backlight. Assuming the radio has a separate backlighting wire.