Does anyone have a picture of what is behind the bulkhead panel where the fuel cut-off switch is mounted? I want to drill a couple of holes to mount a bracket. But I don't want to drill into a wiring harness or something else important behind it. I'm hoping one of you have been in there and can advise.

 

possibly the heater core

 

There is a large wiring loom an inch or two under the inertia switch. To the left of the switch, as you are facing it, are the SLABS and BCU. They are held in place with a metal bracket that you would likely be drilling into should you do anything in that general vicinity. If you're not planning on going too deep, the heavy insulation (1/2 thick) on the inside of the bulkhead is probably all you'll likely hit.

 

Thanks Paul! That's exactly the type info I was looking for. If anyone knows the guts of a rover it's you. I suspected that was an ideal place to tuck something important.

The bracket has two holes about a quarter inch in diameter. Hmmm...I guess I could add more holes to the bracket and use screw rivets to attach. That shouldn't pierce through the insulation.

 

What are you planning to hang on the bracket? How much weight?

 

Relays for a custom electric fan.

A setup like Alex_m put in, but a bit more to it. A new all aluminum radiator with Taurus fan mounted. I'm using the Volvo relay setup for utilizing both high and low speed on the fan via a two temperature sensor used on many German vehicles. The sensor mounts in the radiator and automatically kicks up to high speed once the high range is reached. It is a mechanical sensor using metal expansion to close a circuit.

The Volvo relay controller is for their two speed fans. High and low trigger into center of unit, power in, and two power out(depending on trigger).

I am adding a switched solenoid to the ground of the thermal switch. In addition, I am adding a three way switch for normal automatic function, manual high speed, and off(for crossing deep water) with warning light and siren for off.

Back to the bracket, a GM relay bracket fits the Volvo relay controller. It has four prongs with clips. The Volvo relay controller uses two of the prongs. The bracket is about five inches wide, an inch tall flat bar with four prongs off of that bar pointed down with clips. A mounting hole in each upper corner.

http://tinyurl.com/relay-bracket