90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
Temperature Warning Lamp/Indicator: Testing and Inspection
Without Auto-Check System
Engine coolant overheat warning light, checking
(vehicles without Auto-Check system)
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remove connector from coolant temperature sensor
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connect jumper wire from contact 2 to ground
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start engine and let idle
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warning light must blink
If light does not blink,
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check light bulb
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check wiring according to current flow diagram
If OK,
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replace engine coolant overheat/brake warning light module in instrument cluster