jondee86 wrote:jondee86 wrote:The resistor pack does not need to be grounded. It is just 12V in and 12V out
and there is no reason for grounding.
OK, so I was shooting from the lip there. When the circuit is not active it is 12V in and
12V out, but when it is active it is more like 12V in and 3V out due to voltage drop across
the resistor pack. The injector resistor pack itself will likely contain two ceramic encased
wire wound resistors something like these...
The resistors are sized to provide the required "dropping" resistance, and to dissipate
the heat generated in the resistor without overheating. The metal case holds and protects
the electrical components without forming any part of the circuit. Unlike the metal cased
igniter, the resistor pack does not require the outer casing to be grounded.
I did not say the 'pack' needed grounding. The resistors need the pigtail coming from the pack to be grounded to complete the circuit. The 'pack' cover is a heat sink to help with heat dissipation and needs to be secured to the chassis to protect the wires from their load and vibration. Maybe we are both misunderstanding each other.