Tony Stottler
Registered User
...persists after installing new batteries, starter relay and starter. Please help. 1987 Ford 6.9 idi, 48000 original miles.
Like @Cubey said, could be the cables. Sometimes they fail under the insulation where you can't see, so you may have to peel the insulation off to see if they are corroded badly.First check all the terminal ends and if they are original, you will probably have to cut them off and crimp and solder new ones on.
Rock