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If your Laycock OD does not work, and you have no dash light at any time, access relay near glove box area, remove blue relay, turn ignition on, check for 12 volts at the blue wires in the relay socket. If no voltage, trace before the relay socket.
If voltage, turn power off, check for continuity between the red wire and any dash ground, (4th gear switch on tranny), then for continuity between the blue wire and brown with shifter button pushed (wiring and shifter button), then black and any other dash ground (relay ground).
That process should get you to a point where the difficulty is either elelctrical which from here is highly probable since other items on the fused side of 11 are not working either.
You have blamed the horse for not dragging the plow when you either forgot to hitch up or are hitched to the cow.
Related to technician processes, the plow is the problem, the horse is what you thought was the problem, forgetting to hitch up is a breaking down of the diagnostic process, and the cow is an assumption based upon past experience or lack of knowledge.
Like any technology, there is a learning curve for technicians and manufactureres as well. Both need time to learn and adjust to any adapted, new or improved device. Sometimes the adaptation or improvement or repair process goes astray and devices fail or do not work. 240 wiring harnessess come to mind yet how many on this board have hated or blamed the car for the wiring harness??
Everyone on this board has personall experiences and an eagerness to share to help someone else. Combined, probably just about anything can be solved. A single post may solve a problem all by itself, but blanket trust in only one is a recipe for trouble and frustration as each prblem, though similar, is unique. Ultimate solving must fall back to whomever is dealing first hand with the problem.
In my experience, the Laycock unit is very reliable, with a unique set of failure modes gleaned over too many years of working on them.
In order of frequency, the top three are electrical, actuating piston O-rings, solenoid lock on due to fluid. The first is inconvient. The second, a wear item that is a PITA to correct, the third is sneaky and can lead to other more drastic internal failures.
And the only part..so far.. I have not been able to obtain new at a Reasonable price is the planetary set for the J type.
One Laycock upgrade that failed due to technicians in dealerships was a two part O-ring system on the actuating pistons used in 700 series and late 240 series overdrives. The Teflon wiper could be properly installed at the factory assembly line and last 200,000 miles. Technicians in the field could not. Field replacements failed after less than 10,000 miles. The problem was the process required to install the Teflon wiper, not the technician.
Duane
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