Thread: OE momentary SPDT switch for puma?

Wouldn't the momentary function mean that the switch needs to be held down during operation? This is often used for auxilliary starting via a second battery, not what you would want for winching though, I would have thought you would need a latching switch so the winch stays energised and is then controlled by it's own controller (I'm assuming you are doing this as a security isolation for the winch, rather than an in-cab winch control).
I used a rear wiper switch from a Disco 2 for my compressor, it fits in one of the top row of blank switch spaces on the Puma dash (in the 130 these are all blank, I think the rear wiper and demister switches may be there in the wagon, still some blank spots though). There are several different switches from the D2 that fit these holes, they all seem to have different internal circuitry depending on their function (at least one of them is probably SPDT), also some are momentary and some are latching. I had to modify the internals slightly, plus replace the switch face with the face from the blank.

Pod

The isolator uses a latching relay - so a momentary press will latch it until it is de-energised.

As for factory SPDT, all switches for LR I have seen are Off-On(Mom) SPST units.

The beauty of the rbs I've been looking at is that it will handle the current of a winch and is latching. It only draws current when changing state of the unit- ie from connected to disconnected. Other models will draw 13ma to keep the relay in the closed or open position, which I hope to avoid if at all possible.
I thought I'd be pushing my luck with a momentary spdt switch, but worth asking! Its mainly a aesthetic driven query, not a show stopper.

Have you touched base with Daniel at Mulgo. He is stocking a range of LR switches for the Puma dash with a lasered icon for different functions. Bit pricey for what they are but if originality is paramount the cost can be justified.

MLD

Have not yet spoken to Mulgo, but definitely on the cards.

I'm looking at doing the same thing, but using the Blue Seas 7713 switch, same series but simpler control, only uses 13mA holding current when on.

I like the interface of the 7713 model, as from what I gather it's an auto releasing coil relay... but the downside is the current needed to keep that coil in either the open or closed state (even if only milliamps). For an accessory that will be used once in a blue moon, I'm hoping to keep as many parasitic circuits out of the vehicle wherever possible.

The product blurb mentions that model 7713 can use a SPST switch if a 'normally open relay is desired'. This would put most 'normal' Disco 1 style switches in reach of doing the desired task. I'm guessing that's what I need if I want a factory looking switch.

Would that also mean that if the coil is auto releasing, than it defaults (unpowered) to an open state, and hence requires no current to stay open?

Initially I couldn't understand why blue sea systems wanted another 60 odd bucks for the 'new and improved' 7713 model, when they moved from a 0mA draw bi-stable coil to a 8/13mA draw auto-releasing coil model... but now it's starting to make sense - more switching options, and a potential 0mA draw if operated as a normally open relay!