Jetta GL L4-1.9L DSL Turbo (ALH) (2001)
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Seal engine harness grommet in engine compartment (where overlay harness was pulled through) with Butyl sealer.
Engine overlay harness, routing to coolant bottle
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Engine overlay harness must be routed following factory harness behind fuel and evaporative emission tubes and into plastic clip (arrow) that secures
factory harness.
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Continue overlay harness routing along original harness back to coolant reservoir.
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Install new coolant reservoir.
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Cut old coolant reservoir connector from original harness, fold and tape wires back to harness using vinyl tape (see above - Unused wiring, taping
back to harness).
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Connect overlay harness connector to new coolant reservoir.
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Locate connector to washer level sensor and cut from factory harness (tape brown/white wire back to harness (see above - Unused wiring, taping
back to harness).
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Splice purple/white wire from overlay harness to factory harness using yellow splice (seal using hot air blower).
Vehicles with Climatronic
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Disconnect and inspect ambient temperature sensor -G17- connector for coolant contamination (located behind bumper left side).
If coolant contamination is NOT found:
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Cut brown/white wire from ambient temperature sensor harness approx. 5 cm (2 in.) away from connector.
Using light yellow splice connectors Part No: 111971941A:
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Adding wire as necessary to reach sensor, splice brown/white wire from overlay harness to ambient sensor connector wire (follow and tape to
existing harness as necessary) (use Part No: 000979981 for additional wire).
If coolant contamination is found:
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Install new ambient temperature sensor.