Part 4 is about getting to the road and riding. If everything went well with no hiccups, life would be good. In this case, the phrase that it's not about the destination, but the journey is highly overrated. It is about the destination, on the road again.
Power circuit PDF:View attachment LTD Power Distribution Circuit.pdf
Gerry - have had a look at the electrical schematic and with this comes a better understanding and things to look for. The power to the thermo switch goes on/off with the key, not high on the culprit list.
The culprit is not the engine stop switch, but always want to pick on the little guy. Power into the system can only come through the ignition switch, or the wire from the starter solenoid to the CFI Main relay, brake light and air pump relays. These are hot at all times. The tail light relay has power supplied to it at all times from this circuit, but power flow to fuse 3 in the fuse block can only occur if there is power flow through the ignition switch. The ignition switch provides the trigger power for this relay.
Power is on at all times to the 7.5 amp fuse that is in the left side front fairing pocket, but the fairing is not on at this time and there are no additional power connections after the 7.5 amp fuse.
Going through the schematic, I notice there is an in-line diode between fuse 7 and the license plate light, brake and tail light sensor, and centre rear light assembly. Power does flow to this circuit when the ignition switch is on, but connects to this circuit on the downstream side of the diode. The diode is there to prevent power flowing back through the system (fuse 7). Will go looking for this diode. Fuse 7 should only have power when the ignition switch is in the "P" park position. I seem to recall in my troubleshooting that this fuse is live when the ignition switch is on, will check again. If this diode is not there will install, but power flowing back through fuse 7 should only go to the "P" terminal of the ignition switch and not any further; however, if the ignition switch is worn after some 35 years can become an issue. See page 24 of the PDF file.
Today is another day of investigation and hopefully starting and letting the engine run for a while. Need to make sure the rad fan comes on when it's supposed to. Will be temporarily installing the exhaust system.
Power circuit PDF:View attachment LTD Power Distribution Circuit.pdf
Gerry - have had a look at the electrical schematic and with this comes a better understanding and things to look for. The power to the thermo switch goes on/off with the key, not high on the culprit list.
The culprit is not the engine stop switch, but always want to pick on the little guy. Power into the system can only come through the ignition switch, or the wire from the starter solenoid to the CFI Main relay, brake light and air pump relays. These are hot at all times. The tail light relay has power supplied to it at all times from this circuit, but power flow to fuse 3 in the fuse block can only occur if there is power flow through the ignition switch. The ignition switch provides the trigger power for this relay.
Power is on at all times to the 7.5 amp fuse that is in the left side front fairing pocket, but the fairing is not on at this time and there are no additional power connections after the 7.5 amp fuse.
Going through the schematic, I notice there is an in-line diode between fuse 7 and the license plate light, brake and tail light sensor, and centre rear light assembly. Power does flow to this circuit when the ignition switch is on, but connects to this circuit on the downstream side of the diode. The diode is there to prevent power flowing back through the system (fuse 7). Will go looking for this diode. Fuse 7 should only have power when the ignition switch is in the "P" park position. I seem to recall in my troubleshooting that this fuse is live when the ignition switch is on, will check again. If this diode is not there will install, but power flowing back through fuse 7 should only go to the "P" terminal of the ignition switch and not any further; however, if the ignition switch is worn after some 35 years can become an issue. See page 24 of the PDF file.
Today is another day of investigation and hopefully starting and letting the engine run for a while. Need to make sure the rad fan comes on when it's supposed to. Will be temporarily installing the exhaust system.