The design and install of those hatch relays was terrible, open connections down low in the bilge in a salty moist environment leaving no access to the ER in an emergency when they fail, there was enough wiring on mine to lift the entire panel up high and enclose it all in a waterproof box with access thru a deckplate from above,I also fitted the bonding junction in there.
I have permanent relay bypass switches that can be reached from the deck thru the deckplate in the event of failure.
If you can drop down the center hatch and access the the lift rams the wiring has a crimp join in the harness at the ram motor, you could cut the wiring there and hot wire the actuators, if you can reach the relays you could hot wire it from there, raising the hatch with ratchet straps will be tricky (and dangerous) but if you have no alternative and can get a jack in there you could lift the hatch slightly to relieve the pressure on actuator pins and jack/ratchet strap the hatch open,its really heavy -be careful.
All of the above is assuming you don't have a generator in there (I have) and cant reach anything thru the center hatch.
Are both relays not working? Its one positive power feed from the switch/circuit breaker and one negative from the bus bar (yellow wires located behind the access panel, behind the seat - below the switch panel in the cabin) for both to fail it could be the the wiring is loose on the bus bar, When you say you “ Checked power at the switch” it's a circuit breaker not a switch and may have failed, check power on both sides of that.
Good luck!
The wiring for both wipers runs down the split in the windshield on the port side,pry the rubber separator out on the inside and you will see the wires running thru the frame into the cabin (the wiring runs across the top of the headliner) Pursuit didn't seal that hole -easy fix.
Mark T redid all his windshield screws a few years back and may have some input for you.
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