Go to dieselgiant.com and follow the W123 GP tutorial there to check them and the relay. Our relay is slightly different but the principles remain the same.

Don't try to pull a GP until you search this site for 606 & broken GP or snapped off in head, etc. HOURS worth of reading.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)