relay powered voltage regulator ?
Yes and no. You do NOT want the VR power lead to "sense" the alternator, you want to tie this just as close to the battery, voltage wise, as you can get...........
which is why I'm always preaching voltage drop in both the harness and ground. "Drop" in either will cause the VR to raise charging voltage at the battery
Relays are what I use to run most "heavy" ignition loads. I have one for ignition / charging (field and VR) for EFI, and fuel pump. I have two more for hi/lo beam headlights.
The easy way is to cut the ignition switched wire coming out of the bulkhead. Mount a good quality relay, and run a fused power lead to one contact. A good source is the large starter relay stud.
The switched contact goes to the blue wire you cut feeding to the ignition / VR
The other cut lead, coming out of the bulkhead, goes to the relay coil
You ground the remaining relay coil connection. One thing you need to be careful with Bosch style and knockoff relays is, some have a diode internally to protect the switching circuit. This means one specific coil terminal must be ground
Se below:
86 is ground, 85 goes to the ignition feed you cut coming out of the bulkhead
30 feeds 12V in from a fuse from the starter relay stud
87A is "normally closed" and not used
87 would go off to feed power to the VR and ignition.
Yes and no. You do NOT want the VR power lead to "sense" the alternator, you want to tie this just as close to the battery, voltage wise, as you can get...........
which is why I'm always preaching voltage drop in both the harness and ground. "Drop" in either will cause the VR to raise charging voltage at the battery
Relays are what I use to run most "heavy" ignition loads. I have one for ignition / charging (field and VR) for EFI, and fuel pump. I have two more for hi/lo beam headlights.
The easy way is to cut the ignition switched wire coming out of the bulkhead. Mount a good quality relay, and run a fused power lead to one contact. A good source is the large starter relay stud.
The switched contact goes to the blue wire you cut feeding to the ignition / VR
The other cut lead, coming out of the bulkhead, goes to the relay coil
You ground the remaining relay coil connection. One thing you need to be careful with Bosch style and knockoff relays is, some have a diode internally to protect the switching circuit. This means one specific coil terminal must be ground
Se below:
86 is ground, 85 goes to the ignition feed you cut coming out of the bulkhead
30 feeds 12V in from a fuse from the starter relay stud
87A is "normally closed" and not used
87 would go off to feed power to the VR and ignition.
