Makes sense, but the first email said there was no problem with direct operation. Granted the battery or earth could be so marginal as to work ok on a direct connection but with the added load of a relay coil, causes it to drop out and start buzzing. However a relay coil is a pretty small load, otherwise you'd not fit one.
My guess is the relay, not the solenoid, is dropping out when the starter operates, so stops and causes the buzzing. But from what was said, I'd think on low voltage the relay drops out before the solenoid, hence working ok on a direct connection. A Morgan of that age could easily have a duff earth, so attention to the earth lead may well cure the problem. But I'm still inclined to think the relay has been added, and is an owner modification. As a result I'd still look into this as although improving the earth or high current feed may cure the problem, if the relay is not really needed, it would be a simpler, hence more reliable car without. Somebody must have a wiring diagram for the car? rgds Martyn From: e-mail colin.jones5857 [mailto:[email protected]] Sent: 01 August 2012 10:24 To: mogtalk2 Subject: Re: [mogtalk2] Moss Box +8 starter Guys Late to this, Brian is right, a buzzing solenoid is nearly always a low battery voltage or a duff earth. The following should help diagnose. Get some jump leads Attach one end of one lead to the engine block/bell housing is fine, just get a good earth. Attach the other end of that lead to the battery Negative terminal. Try to start the car, if it starts its a bad earth lead, not exactly unknown, just fit another (mine has 3). If that does not work just jump the battery from a known running car battery, remember to connect one lead at a time! If that does not work..... Take the positive lead from the jump leads off the battery and connect direct to the starter solenoid large cable input stud (just clamp it on) if that fixes it you have a major voltage drop in the main supply lead (very unlikely and rarely seen). If all else fails give the starter solenoid a sharp rap with a metal bar/large socket extension/small hammer to see if its sticking through lack of use. My money would be a bad earth caused by a corroded earth strap, most of these problems are caused by that. Hope that helps. BR Colin ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
