Quote:
Originally Posted by sigepbiker
Drew a nice picture of what I think you need to do: What if you put in another relay whose solenoid's is in series with the Headlight relay's solenoid? All the orange lines are new wires, notice the headlight relay now needs to be connected via jumper wires so the new relay can be connected.
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I don't understand why you think the new relay is necessary. The coil side of the factory relay is already normally powered off the switched side of the headlight relay. The body ECU will turn off the headlight relay 30 seconds after the ignition is turned off, the drivers door has been opened and shut, and all other doors are also shut.
I would be cautious adding additional load like another coil to the HRLY signal from the ECU. Normally transistor based output stages are limited to 200-300 mA of current, which is enough for only one relay coil. If the ECU doesn't have internal overload protection, you could damage the ECU. Typically, this would result in the output stage transistor getting shorted, which would make it so that the Body ECU would not longer be able to control the headlight relay. In a worst case scenario, it would render your headlights inoperable.
If you feel that the additional relay is needed, it would be better to tap the Red-Black wire coming from pin 3 of the headlight relay as the 12V supply to the aux relay.
