Hi Campbud here are the codes from the web site
http://www.tekonsha.com/faqprodigy.html#008 the 5h may be the SH errow code? With my 2955rl I have had to replace two magnets in the rear axle because the wires wore holes to ground. I'd look there FIRST good luck!
Heres an earlyer post
The 5er is 4 months old and just changed out the second magnet. This may help some of the Monte owners with Dexter axles; the magnet wires are rubbing what Dexter calls the actuating lever until the wires short out. The Prodigy will show OP, or SH errors. Called Dexter to inform them of the problem and ask for there fix. After some discussion, we both came up with wrap the wire with some of that slinky like stuff, and try to get some clearance for the wire. Hope this may help some of you to save us time and money with dealer’s costly repairs.
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