Tuesday, May 11, 2021 at 12:40
"Is it a warning about damage to the REDARC or false reading?"
Most of the pins can be checked with a voltmeter. Pin 5 (the brake control line) can be checked with a meter when most brake control units are installed but not with the TowPro units.
TowPro brake controllers spend most of their time asleep (just like other models.) Most brake controllers wake up when you press the brake pedal but not the TowPro. You can not detect any significant voltage on the trailer connector brake pin when attempting to
test it with a voltmeter. Tow Pros require a solid load on them to wake them up. A stoplight incandescent globe will wake them up.
This appears on page 31 of my EBRH-ACCV3 handbook"
"Immediately After Installation (To be done by a qualified Auto-Electrician)
Test the installation/vehicle wiring. Testing your vehicle wiring is best done by connecting a
test light (Max 21W filament globe) to the brake output, pushing the manual override and having someone
check that the
test lamp lights up."
This is a trap if you have things like hydraulic disk brakes or some models of anti-sway units on the trailer. They do not provide sufficient load on the TowPro output circuit to wake the controller up. Redarc's solution is to wire the same resistor you use with LED turn indicators on trailers (to correct vehicle monitoring circuits operation.) I found this out when I acquired my latest Navara which is fitted with a TowPro brake controller would not operate the van brakes with a Dexter anti-sway fitted. A resistor across the Dexter input fixed the problem.
FollowupID:
914265