OBD Code

[phazer42]

Shuttle Valve Switch Failure....

pins 25 and 27 should have a resistance value of around 3,000 ohms at rest, 2,000 ohms half way depressed and 1,000 ohms fully depressed. If the connections are correct.... then your modulator is bad....

[Monarchy]

Can I just buy a Land Rover Discovery modulator ($100 ebay used) and swap that out? That looks much easier than trying to replace the switch...

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