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<p>[QUOTE=&quot;fortycalglock, post: 12237842, member: 67063&quot;]Here’s my problem.: 2019 Western Star 5700xe and the tractor brake lights (trailer isn’t affected) won’t turn off. I’ve disconnected all 3 air switches to the left of the column with no luck. Pulled fuses and relays, none. Unbolted the firewall to chassis cable and they went out. Reconnected and they’re back on. Pulled the top plug on the ECC (lights went out) and the ECC has voltage on the pins. I’m guessing the ECC is bad, but I can’t find the complete wiring diagram for it on EZ Wiring. I guess it’s possible it’s through putting the brake signal from something else. Any ideas other than throwing a $750 ECC on?[/QUOTE]</p><p><br /></p>

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