The battery is not the problem. Take the wires off the otterstadt switch and connect them togther with a paper clip. If the fans start and continue to run (with the ignition key on) the otterstadt switch is the problem. If they run and stop the circuit breaker is probably the problem. If the fans don't run at all it could be the fuses, the fan relay(if you still have it) or a wiring problem. You MUST bleed ALL the air out of the system or the otterstadt switch can't feel the hot water circulating. If the otterstadt switch in on top of the pipe (early version) refit it to make it work like the later version on the bottom of the pipe. Carefully inspect the fan fail mod for any signs of overheating. As for the horn you will have to troubleshoot it separately, the 2 systems do not have anything in common. There is no horn relay. It will probably turn out to be either the horn switch or the horns (unless someone has messed with the wiring in which case all bets are off!). BTW the only positive method of bleeding the air out of the cooling system is to use a pressure tester. Borrow or rent one if you have to. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, mike p <cambpd@...> wrote: > > Hi, I replaced all my cooling system hoses. One of the cells of my old battery was dry and dead so I replaced it with a Sears Die Hard 795 CCA. I got the car started and began purging air out of the cooling system. When the engine got a little over 200 degrees F. the cooling fans cut on for about 2 seconds and then cut off again. I thought it was just because there was not enough coolant going past the otterstat to make it keep the fans on. But when I had the air purged out of the system the fans still won't come on. I checked the fan wiring from the fan fail mod. and none of my fuses are blown. Also the horn worked when the car was running with the new battery To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/