Mine went off for the first time in 2 years last week in the middle of the night, I could not find anything that caused it. I cut one wire to silence it and the next day, I spliced it back together. Everything went back to normal.
I will just keep an eye on it.
BTW, priced the one I have on ebay and it runs almost $100.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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