Tell-Tale circuit board

[Glen Even]

I’ve got a 1975 Palm Beach. I’ve been tearing into my dash & found that my Tell-Tale circuit was damaged. I’m trying to repair it but thought I’d reach out to the GMC community to see if anyone has one. Neither Sirum nor Applied has any. My circuit board has white light bulbs in the back, not black.
Does anyone have it?

 

[Rich Kinas]

I've got one it you still need one.

 

[Glen Even]

Thanks for responding but I found one already.

 

[RF_Burns]

That part is fragile and I would advise everyone from refraining the urge to unplug the wiring harness. That might be its death.

When replacing the lamps use LED's to reduce the heat and prolong its life!

 

[Keith V]

Doesn't anyone reproduce these?

 

[pvfjr]

Doesn't anyone reproduce these?

I don't know of any. Flex circuits are a lot more expensive in low quantities. If I were to redo these, I'd redesign it with a rigid PCB with SMT LEDs, and I'd change the connector. It'd be a lot cheaper and more reliable that way.

 

[bob coleman]

I’ve got a 1975 Palm Beach. I’ve been tearing into my dash & found that my Tell-Tale circuit was damaged. I’m trying to repair it but thought I’d reach out to the GMC community to see if anyone has one. Neither Sirum nor Applied has any. My circuit board has white light bulbs in the back, not black.
Does anyone have it?

I used a conductive silver paint to repaint the traces. Work great got it off eBay.

 

[Keith V]

I'm looking for one, it can be bad, so I can reproduce them, it shouldn't be that hard. but mine is in use!

 

[74_Coach]

Doesn't anyone reproduce these?

This eBay listing recently appeared. It doesn’t look the same as the GMC part but maybe reach out to the seller to create that part.

Ed

 

[74_Coach]

This eBay listing recently appeared. It doesn’t look the same as the GMC part but maybe reach out to the seller to create that part.

Ed

This eBay listing now includes 73-78 GMC Motorhome.

 

[RF_Burns]

I'm looking for one, it can be bad, so I can reproduce them, it shouldn't be that hard. but mine is in use!

Keith, If you are reproducing the Tell-Tale panel board, may I suggest using a Phoenix Contact type connector block similar to shown below. Much easier to reproduce the board and a rugged readily available connector.

And hey.. how about using some WS2813 addressible LEDs driven by an ESP32 for some wild indicator colours... and Bluetooth/ WiFi connectivity. Nothing better than using an App to check if your parking brake is ON, or getting an email to tell you the door is ajar!

 

[Keith V]

Keith, If you are reproducing the Tell-Tale panel board, may I suggest using a Phoenix Contact type connector block similar to shown below. Much easier to reproduce the board and a rugged readily available connector.

And hey.. how about using some WS2813 addressible LEDs driven by an ESP32 for some wild indicator colours... and Bluetooth/ WiFi connectivity. Nothing better than using an App to check if your parking brake is ON, or getting an email to tell you the door is ajar!

Bruce, Bluetooth is a no go. the fees from the Bluetooth SIG are huge and they WILL sue you. So nope.
Wifi, might be possible,,, I think the licensing is way better ( like non existent )

I do like the addressable LEDs,
I'm still looking for a telltale board, I suppose I should ask Jim K...

 

[Bhart]

If you are looking for the plastic lamp holder, I have an extra one but, there are two styles.
Not too noticeable but different

 

[Keith V]

Uh Dang, that makes me think I need to just make a replacement for the whole thing.
Time to open the ol dash I guess, well as soon as it's above 0 degrees anyway!

 

[RF_Burns]

Bruce, Bluetooth is a no go. the fees from the Bluetooth SIG are huge and they WILL sue you. So nope.
Wifi, might be possible,,, I think the licensing is way better ( like non existent )

I do like the addressable LEDs,
I'm still looking for a telltale board, I suppose I should ask Jim K...

Keith, I was trying to be funny with the Bluetooth and wifi App comment!

Just for info, why would I need to licence Bluetooth or wifi when using a module like the ESP32 that has those features built in? I'm guessing ExpressIf has already made the required licencing.

 

[Bhart]

If you are looking for the plastic lamp holder, I have an extra one but, there are two styles.
Not too noticeable but different View attachment 12646

Top tell-tale holder was from a 1977 Kingsley
Bottom tell-tale holder maybe from a 1973 canyonland

 

[Keith V]

Keith, I was trying to be funny with the Bluetooth and wifi App comment!

Just for info, why would I need to licence Bluetooth or wifi when using a module like the ESP32 that has those features built in? I'm guessing ExpressIf has already made the required licencing.

Wifi doesn't need a license, it would just need unintentional radiator testing. If you don't do that, no one will care, but if your device is noisy and causes trouble you can get fined.

Bluetooth is a whole different ballgame. the Bluetooth SIG is nicknamed the Bluetooth Mafia. you cannot use their IP without paying for a license. you cannot advertise, mark or imply Bluetooth on any device without an official license. If and When they find out they will sue, and they do. It's not worth the gamble for a large legal bill and a large fine. People do use the ExpressIF, etc., without said license, and they do get away with it. But I don't play Russian Roulette on 10's of thousands of dollars. BTW the license for adopter is free, but it is $11,000 to qualify a product and you have to qualify to use it.
Thats why there is no BLE on Microlevel. and Yes, Ive talked to a certification house about it

 

[pvfjr]

Could you get around the Bluetooth cert by just adding a UART port to your boards? Have just be coincidentally compatible with some other BLE daughterboard, like these:

Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy (BLE)

Would you like to add powerful and easy-to-use Bluetooth Low Energy to your robot, art or other electronics project? Heck yeah! With BLE now included in modern smart phones and tablets, its ...

www.adafruit.com

 

[Keith V]

Yep, that works because youre not changing the BLE operation. A USB BLE dongle works the same.
It looks like a serial port on the other end

 

[RF_Burns]

If you are looking for the plastic lamp holder, I have an extra one but, there are two styles.
Not too noticeable but different View attachment 12646

Appears maybe GM changed the style of twist-lock lamp holder. As long as the center of the lamp holes are in the same place for the LED to poke through, only one board would be needed. If the lamp holes are off too far, one circuit board design should still work with provision to mount each LED in two different locations to match the lamp holder assembly. A through hole Phoenix contact style connector could be used where the original connector was located.

The "Set to Travel" timer could also be incorporated on the board, as well as the "Low Fuel" module using a small 8 pin micro like a PIC 12F series.

Appears also that original flex was glued in place, so the end user might need to drill a couple holes to mount the board to the holder.

Just my thoughts.