5mm TA w flashing end lamps

[StEaLtH2]

Good morning, I have one for the older gen Whelen experts. Have a Fire apparatus with the 8 lamp w end flasher all 5mm modules. One of the end lamp flashers has decided to make itself steady burn. Before I take a closer look, can an expert tell me how the pattern is changed on the module? I do not see the typical two pins that you shunt with a penny under the lense. Thanks for any tips.

 

[JohnMarcson]

Good morning, I have one for the older gen Whelen experts. Have a Fire apparatus with the 8 lamp w end flasher all 5mm modules. One of the end lamp flashers has decided to make itself steady burn. Before I take a closer look, can an expert tell me how the pattern is changed on the module? I do not see the typical two pins that you shunt with a penny under the lense. Thanks for any tips.

It depends on the model. Some of the heads were "dumb" and were run off a flasher unit either in the arrow bar or externally. The manual below seems to indicate straight 12v power and ground to both flashing units which would indicate they have internal flashers. However I have seen these with the end lights on an external flasher.

"The remaining ORANGE and BLUE wires control the LED flasher panels. Connect the ORANGE wire to a customer supplied SP/ST switch. Extend an appropriately sized wire (see warning) to +12VDC and fuse at 3 amps (customer supplied). Extend the BLUE wire to chassis ground."

Usually a steady burn on these means the module has failed or is grounding out somewhere. Removing the module and testing it is usually required.

https://www.whelen-engineering.com/install/135/13513.pdf

Poke around the old Whelen literature section for traffic advisors

Traffic Advisor Manuals