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Old 03-02-2015, 11:15 PM   #1
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Join Date: Nov 2014
Location: Palo Alto, CA
Posts: 18
Headlights, wipers, climate control only work when engine is off

After 5 months on jack stands in my backyard, I am finally driving my boxster again. I am having a strange issue with the electronics, however.

With the key in the "On" position (engine off), the following systems are fully operational:
- windshield wipers
- headlights
- air conditioning (including blowers)

When I start up the car
- windshield wipers do not respond to controls
- I am able to turn on running lights, but not low beams (so cannot see road at night). High beams come on when pulling on lever, but not when lever is pushed forward.
- The A/C blower does not turn on

Any idea why all these systems would be disabled when the engine is on?

I have a Durametric kit that I can use to read values and check/reset codes, if necessary. Thanks for any help.

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Old 03-02-2015, 11:27 PM   #2
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Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
Faulty ignition switch would be my first guess. When the electrical portion of the switch fails, lots of electrical faults occur.
Use the search function for the list of (potential) electrical problems - the correct part number is # 4A0 905 849 B to order......

2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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