- Joined
- May 2, 2011
- Messages
- 91
- Vehicle Year
- 2009
- Transmission
- Manual
Grapegoat,
Assuming you mean a circuit like:
If the question is how safe is this, the answer is entirely providing appropriate sized wires and switches are used. Of course if Fuse A blows you de-energize all 3 relays.
The troubleshooting procedures for Fuse A would be:
FUSE A BLOWS:
A) Remove Fuse A, Relays 1-3, and place switches 1-3 in the off position.
B) Replace FUSE A, if it blows you have a short in the wiring between Fuse A and the switches.
C) Turn on Switch 1, if Fuse A blows the short is in the wiring between Switch 1 and Relay Coil 1.
D) Turn on Switch 2, if Fuse A blows the short is in the wiring between Switch 2 and Relay Coil 2.
E) Turn on Switch 3, if Fuse A blows the short is in the wiring between Switch 3 and Relay Coil 3.
F) Replace Relay 1, if Fuse A blows replace Relay 1.
G) Replace Relay 2, if Fuse A blows replace Relay 2.
H) Replace Relay 3, if Fuse A blows replace Relay 3.
I) If Fuse A does not blow have a beer.
Assuming you mean a circuit like:

If the question is how safe is this, the answer is entirely providing appropriate sized wires and switches are used. Of course if Fuse A blows you de-energize all 3 relays.
The troubleshooting procedures for Fuse A would be:
FUSE A BLOWS:
A) Remove Fuse A, Relays 1-3, and place switches 1-3 in the off position.
B) Replace FUSE A, if it blows you have a short in the wiring between Fuse A and the switches.
C) Turn on Switch 1, if Fuse A blows the short is in the wiring between Switch 1 and Relay Coil 1.
D) Turn on Switch 2, if Fuse A blows the short is in the wiring between Switch 2 and Relay Coil 2.
E) Turn on Switch 3, if Fuse A blows the short is in the wiring between Switch 3 and Relay Coil 3.
F) Replace Relay 1, if Fuse A blows replace Relay 1.
G) Replace Relay 2, if Fuse A blows replace Relay 2.
H) Replace Relay 3, if Fuse A blows replace Relay 3.
I) If Fuse A does not blow have a beer.
Last edited: