OK, everything is running right with my 1986 volvo 240 dl now, execept now every so often the battery warning light, parking brake, brake failure and bulb out warning lights are all (all 4 lights) lighting up at the same time on my dash. It happens more than occasionally for about 3-5 minutes then they turn off. The parking brake is down and the brakes and brake lights work. Also, there seems to be a squealing noise coming from the engine compartment at cruising speeds, it almost sounds like a jet engine taking off (a high pitched whirring sound), it slows and goes silent as I slow to a stop, could this be a belt or the alternator? Also, while removing my preheat hose (the thing was cracked near the manifold) I noticed that there is a green cable with a circle like connector hanging not connected on the back of the alternator. Should this cable be connected to the alternator, what is this green cable (only a thick red cable is connected to the alternator)? Thanks.

John