My '78 dodge D100 has a purple/white wire running from BATT positive to the fuse box...a source shows it being \'fusible linked\',  another does not---it may have been at one time but my fireman son "doctored" the wires to bolt on lights etc..........does it need the link or an inline fuse and if so what size????????? Paul Johnson Fincastle,Va.

Paul,

According to the 1978 service manual the battery terminal had a purple wire coming from it that connected to an 18 gauge fusible link wire and the other end of the fusible link connected to your purple/white wire. You can get the fusible link wire from any good parts store, they just need to know what gauge the fusible link wire is.

Hope this helps,
Matt

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