The 2 relays on the left hand side of the air box on my 750ie Dark click at about 5Hz as soon as I turn ignition on and no response from start button. The relays are brand new and have fitted a new starter motor. HELP! Not sure what these relays are for as can't find a wiring diagram for my bike.
Relays clicking.
- Thread starter STJohn
- Start date
Mark64
UKMOC Member
Battery earth lead + starter motor cable integrity?
STJohn
Registered
Thanks for the interest guys. The battery is at 12.6V. My son bought a new starter motor shortly after I had broken down because we thought it may have been the reason for the breakdown. I had stopped in a service station for 15 mins and then the bike would not start - completely dead. only neutral light and oil lights on after all the lights flashing briefly. When I got home (Greenflag) one of the relays I mentioned looked burnt on the top, so my son went and bought 2 new ones. I have checked the starter solenoid, and battery and earth connections. The stand switch is disabled. Have checked the ignition coils. Checked some of the connections near the ignition switch. Found nothing wrong so far. Frustrating that my bike wiring is different to the Haines manual I have and also different to the owners handbook. E.G. The diagrams show 4 wires coming from the ignition pickups I only have 3 wires coming out of the LH engine case (besides the alternator wires). Any tips gratefully received.
12.6 Volts should start it okay, but the problem smacks of ultra low voltage.
It could be getting stopped by a high resistance connection(s) somewhere? This would probably have to be at the battery terminals to affect the relays and the starter.
I'm thinking it could be that the battery has completely run out of "cranking amps"?
To test this, put a meter on the terminals and watch what happens to the voltage when you thumb the starter. If it's lost it's cranking amps the voltage will drop dramatically at this point and probably slowly recover when the button is released.
Only cure for that is a new battery, but have someone put a professional meter on to confirm. (Maybe at the battery store or a garage?)
If that cures it and you get her running again, I would check the charging voltage. The burnt relay smells of over charging.
Just put the meter across the battery terminals when it's running and you should see about 14 volts. If you see 15 volts or over at say 2000 rpm (or any revs!) then I'm sorry but your reg/rec is fried and needs to be replaced.
Make sure to use very low resistance connections on the 3 yellow cables from alternator to Reg/Rec, or hard wire them. I use Gold connectors on all my bikes and have trouble free charging.
Check the yellow cables for heat stress, soft, charred or melted insulation and replace as necessary.
It could be getting stopped by a high resistance connection(s) somewhere? This would probably have to be at the battery terminals to affect the relays and the starter.
I'm thinking it could be that the battery has completely run out of "cranking amps"?
To test this, put a meter on the terminals and watch what happens to the voltage when you thumb the starter. If it's lost it's cranking amps the voltage will drop dramatically at this point and probably slowly recover when the button is released.
Only cure for that is a new battery, but have someone put a professional meter on to confirm. (Maybe at the battery store or a garage?)
If that cures it and you get her running again, I would check the charging voltage. The burnt relay smells of over charging.
Just put the meter across the battery terminals when it's running and you should see about 14 volts. If you see 15 volts or over at say 2000 rpm (or any revs!) then I'm sorry but your reg/rec is fried and needs to be replaced.
Make sure to use very low resistance connections on the 3 yellow cables from alternator to Reg/Rec, or hard wire them. I use Gold connectors on all my bikes and have trouble free charging.
Check the yellow cables for heat stress, soft, charred or melted insulation and replace as necessary.
Darren69
Transmaniacon MOC
The 2 relays are Injection and Main. Injection controls fuel pump and injectors and Main does coils amongst other things. See if you can find a copy of the Ducati Service manual for your exact bike as the wiring diagrams will be more accurate. If you can hear fuel pump prime then that one is working fine.
Darren69
Transmaniacon MOC
This looks like the correct factory manual for your bike. Will be more accurate than the Haynes one I expect. Most of the IE bikes are much the same though.
Ducati Monster 600 - 750 Service Repair Workshop Manual USB 1996 - 2003 | eBay UK
Ducati Monster 600 - 750. Supplied in PDF format on a Dedicated USB Drive. Covers Very Basic Maintenance Procedures Thru to Complete in-depth Technical Diagnostics. Use and Maintenance. Service - Maintain - Repair.
ebay.us
STJohn
Registered
Thanks Darren69. Do you know why the relays would be clicking as soon as I turn ignition on? I have just ordered the PDF manual you recommended before I saw your post!!
Darren69
Transmaniacon MOC
Usually because of low battery or a bad connection. If it turns out to be the battery, and it usually is then check its charging on the bike reg recs are a common failure.
STJohn
Registered
I think I need to connect a diagnostic tool to find out what is wrong. Has anyone experience of the £29.99 diagnostic units eg Gendan.
Darren69
Transmaniacon MOC
Yes I use JPDiag, its a bit clunky but it works.