Source for solenoid? '87 Holiday Rambler Class C (E350)

[JeffOYB]

My father-in-law is trying to replace this solenoid from his E350 1987 Holiday Rambler RV. He can't figure it out. He's bought a couple things already that an RV place said would work and they haven't. It's a two-piece item. They've spent days on it and have driven 100+ miles goose-chasing. Thanks! (They also haven't been able to determine the engine size. The VIN brings up screwy info.) At this point, tapping it with a hammer gets the RV to run for awhile but it's unreliable. Maybe it can be refurbished somehow? Thanks for any ideas! Here are a couple pics of the solenoid.

[darsben]

one and gone

[Fishinghat]

It is a solenoid. There are two kinds, one that is designed to operate intermittently, like for starting the engine, and one that is designed to stay on constantly, like that needed to power things like wipers, heater blower, etc., that you want on when the engine is running, but off when the key is off.

The are very, very common. I've bought some replacements at NAPA, but any good auto parts place will have what you need.

[donn0128]

Standard battery isolator. I suspect your getting wrong parts because your mis-identifying the part. It is there to allow the alternator to charge the house battery and block it from discharging the chassis battery when parked.
Start looking online or call the good folks at Texas Industrial Electric. Give them all the info from the old part and they should get you a better quality replacement.

[darsben]

CLICK HERE

If that not it click here and choose

Bye the way when I was on the road I had one stop working. I took apart the switch and filed the corrosion off the big metal washer and 2 posts that connect to the ring. I oiled it up a little and it worked for months.