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StarfireGuy · 06-28-2012, 05:10 PM

I made a trip from Pittsburgh to my brothers in Hot Springs two weeks ago (lousy timing with the lovely 100+ deg temps EVERY day). On the way belts had to be replaced, and once that was done, on the next fuel stop, it wouldn't start, had power to the lights, etc but not to starter. I replaced what appeared to be the original relay on the firewall near the battery and the relay mounted on top of the engine going to the starter. On the trip I also noticed there is a constant drain on the battery and intended to check it out once at my brothers, but was disconnecting the battery till then. Unfortunately, I forgot to disconnect it when I got there and a couple of days later when I went to move it, it was dead. I attempted to jump with cables, and when I turned the key it started to turnover then stopped, and now I have ZERO pwr to the fuse box and zero power to the relay on top of the engine. I have checked connections to everything and they are tight and as they were prior to this issue. So here I am asking (begging) for any help/ideas? Thx

StarfireGuy · 06-28-2012, 05:30 PM

Update, not sure why I didn't think of this before, BUT, I run a some jumper cables to the relay on the engine and got it to start. SOOOOO, does that mean there is an issue at the fuse box, or one of the relays or both relays OR? I am only a novice (OVER statement) at automotive electrics.

Dave78Chief · 06-28-2012, 07:35 PM

Most likely a fusible link has opened and will have to be replaced. On a P30 chassis:
1) There are several attached to the starter solinoid. Here is a post that shows how they are connected.
http://www.irv2.com/forums/f65/1989-...ml#post1181106

2) There is most likely another one attched to the junction post on the firewall (under hood, not inside rig).

The starter circuit does not go via the fuse block.
Battery to aux start solinoid to large starter solinoid post to junction post (via fusible link) to ignition switch (via another fusible link) to nuetral safety switch to coil on small starter relay (the one you replaced?). The small relay supply contact is feed via a 2nd fusible link off of the main starter solinoid post. The other small relay contact connects to the starter solinoid "S" terminal. Can be an open anywhere along that path.

Midniteoyl · 06-28-2012, 07:49 PM

Quote:

Originally Posted by Dave78Chief

Most likely a fusible link has opened and will have to be replaced. On a P30 chassis:
1) There are several attached to the starter solinoid. Here is a post that shows how they are connected.
http://www.irv2.com/forums/f65/1989-...ml#post1181106

2) There is most likely another one attched to the junction post on the firewall (under hood, not inside rig).

The starter circuit does not go via the fuse block.
Battery to aux start solinoid to large starter solinoid post to junction post (via fusible link) to ignition switch (via another fusible link) to nuetral safety switch to coil on small starter relay (the one you replaced?). The small relay supply contact is feed via a 2nd fusible link off of the main starter solinoid post. The other small relay contact connects to the starter solinoid "S" terminal. Can be an open anywhere along that path.

jimbo16720 · 06-28-2012, 07:59 PM

Follow positive from battery to each connection till you find the open circuit.

StarfireGuy · 06-28-2012, 08:39 PM

Thank you for that information and the link! I will investigate tomorrow morning.

Why are there the two junction post relays, never seen that setup.

Dave78Chief · 06-29-2012, 02:35 PM

My 84 wiring documentation only shoes 1 relay for sure. THere is a "speed" sensor related relay but is not wired tothe junction post. Don't forget it could be a relay Winnebago added.

StarfireGuy · 06-29-2012, 02:43 PM

Well its 106 deg today, and not much shade to park the Rig under, so not much investigating at the moment!

The relay/solenoid is mounted on a heavy bracket, just have to see why it was starting without jumping the relay/solenoid and now its not.

Another thing is that I disconnected to both aux/coach batteries when I found the chassis battery dead during the trip down, just to be safe, and so I'd have battery pwr if I needed a jump. I will connect them again and see what happens (if anything)