I cant help you with the wiring, but like to know specifications of tires and TT, so I can yudge if used pressure courced the blow out.
I rather think the wrong choice of TT-maker for tires with poor or no reserves courced the blowout, and by this the Cinesese tires, often used by TT-makers, for their economy reasons, gotten a bad name.
Need from TT next.
GVWR
GAWR('s) and howmany axles.
If ever weighed axle or axle-end loads.
Used pressure
Used maximum speed, you wont go over for even a minute.
Need from tires:
1. Maximum load or loadindex
2. Kind of tire to determine the maxloadpressure.
So if ST and loadrange or better pressure behind AT given on sidewall.
3. Speedcode if given.
Sizes would be nice too.
If you give that all, I will calculate a maximum pressure at wich no screws tremble loose. Then if you use that pressure, tires could make upto 10 years without blowing ( exept by punctures). TT makers give often max of tires, because used to the edges of safe, and dont include reserves.
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