The Ford Barn

dlfrisch · 03-23-2015, 10:38 PM

As the Thread submitted by Sr. Member - Phred on 3/10/15 and my note to that topic #23.
I am still in an electrical jam. I am somewhat knowledgeable in electrical circuits. The schematic that I drew up is comparable or the same as the drawing that Phred posted #19 of his Thread. BUT, it can't work using the positive grounding application and the existing ignition switch. When the vehicle is shut down the 6V coil of the relay should not be powered and it should then neutralize and the normally closed contacts complete the circuit of the tail light loop and if the lights were left on, this will complete the circuit to the alert buzzer. Checking the ignition switch wiring -0ne side of the ignition switch is hot to ground (using the test light) - turn the switch on and both sides of the switch are now open to ground. Check both sides of the engine coil and they are hot to ground (with the test light).
I can't use the 6V alternator, because it will not go to ground (through the windings) when not charging like a generator will and using a diode to one side of the buzzer.

I can't figure how to kill the relay coil when the engine is shut off.
If, anyone has an idea, let me know on a Thread note or send me an email.
Dave
Attached Files (Phred #19 Thread)

Scan0001.pdf (225.2 KB, 9 views)

03-23-2015, 10:38 PM	#1
dlfrisch Senior Member Join Date: Feb 2014 Location: Florida - 32128 Posts: 416	Runing lights left on and installing an alert buzzser As the Thread submitted by Sr. Member - Phred on 3/10/15 and my note to that topic #23. I am still in an electrical jam. I am somewhat knowledgeable in electrical circuits. The schematic that I drew up is comparable or the same as the drawing that Phred posted #19 of his Thread. BUT, it can't work using the positive grounding application and the existing ignition switch. When the vehicle is shut down the 6V coil of the relay should not be powered and it should then neutralize and the normally closed contacts complete the circuit of the tail light loop and if the lights were left on, this will complete the circuit to the alert buzzer. Checking the ignition switch wiring -0ne side of the ignition switch is hot to ground (using the test light) - turn the switch on and both sides of the switch are now open to ground. Check both sides of the engine coil and they are hot to ground (with the test light). I can't use the 6V alternator, because it will not go to ground (through the windings) when not charging like a generator will and using a diode to one side of the buzzer. I can't figure how to kill the relay coil when the engine is shut off. If, anyone has an idea, let me know on a Thread note or send me an email. Dave Attached Files (Phred #19 Thread) Scan0001.pdf (225.2 KB, 9 views)