Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISPOWER AND GROUND DISTRIBUTIONSERVICE AND REPAIRGENERAL
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
General
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION General
Wiring harness and connector repairs must be done only with the VAS1978 wiring harness repair kit.
When routing wiring or harnesses through openings in sheet metal, make sure that original equipment grommets are used as listed in the parts catalog.
Only use original equipment, tin-plated (eyelet type) ground terminals as listed in the parts catalog.
Badly corroded ground terminal blocks -1- can be repaired by grinding off an amount no greater than dimension -a-:
a = 2.5 times the bolt outside diameter
Tightening torque for ground connections:
Ground connection Tightening torque
Bolts with M6 thread 9.5 + 0.5 Nm
(58 + 4 in. lb)
Bolts with M8 thread 23 + 3 Nm
(17 + 2 ft lb)
VAS1978 wiring harness repair kit
Wiring harness and connector repairs must be done only with the VAS1978 wiring harness repair kit.
VAS1978 wiring harness repair kit
Using the VAS1978 wiring harness repair kit is described in the included instruction booklet.
Also repairs of wiring breaks and faulty connectors are described using examples.
NOTES:
- Do not repair shielded wiring that is part of the ABS system.
- See other cautions regarding wiring and connector repairs. Wiring Harness, Terminals and Connectors, Repairing
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.