Leccy peeps, riddle me this..?

[jaylee]

I have a very nice tidy MX3 cab light sun roof switch unit that i wish to tie in & override with the original switch situated center & behind my seat... I'm rather fed up of playing the contortionist groping the ceiling to operate the sun roof switch.

The plan is to have the set up a bit like the drivers window switch override the passenger side..?

With a tiny bit of modding it fits & the courtesy light plugs straight into the loom..
There is second plug for the sun roof switch that spade connects to a loom i made running across the cab roof lining & out where the original SR switch is located. Nothings plugged in to existing SR loom yet..


Because testing the MX3 switch for the sun roof putting live through connection A http://www.mx-3.com/manuals/showimg.php ... -M-011.gif & testing continuity from B & C gives a constant live until the switch is pressed either to close or open when in relation to how the switch is operated C or B voltage cuts off??

Not what i expected..!

Here is the page i got from an MX3 site i found...! http://www.mx-3.com/manuals/index.php?f ... 0Manual/M/

I may need to re engineer the switch?

Any ideas??? Cheers.

[bigdaddycain]

I haven't a flamin clue jamie! But it sounds good, and at least me posting bumps the thread a bit...

[321Away]

what!!! from your description, just a bit confusing! i'm taking it that when you power up pin A, both B&C go live, then when you operate the switch in either direction, the coresponding pin B or C, breaks continuity? or am i losing the plot too! are you attempting to add a switch ot just move yours?
julian

[g8dhe]

The circuits for the MX3 and the Bongo are identical, see the Wiring diagrams (1995 has the circuit).

[jaylee]

what!!! from your description, just a bit confusing! i'm taking it that when you power up pin A, both B&C go live, then when you operate the switch in either direction, the coresponding pin B or C, breaks continuity? or am i losing the plot too! are you attempting to add a switch ot just move yours?
julian

Nope, you are spot on..! & I am attempting to add the switch...

The circuits for the MX3 and the Bongo are identical, see the Wiring diagrams (1995 has the circuit).

That's what i would have thought Geoff..? It certainly fits straight into the courtesy light loom... ( & alot brighter than the original.. I was gona get leds..)
But the MX3 switch just breaks live (or negative.. Yep i have been playing about with it.) continuity on the relevant wire when rocked on the open or closed..?
I did take the switch apart, & that seems to be the way it's set up??
There does appear to be a wire (factory) soldered to the back of the switch that seems to run to ground & head off to the Courtesy loom?? .. I cold be wrong!?

[jaylee]

I haven't a flamin clue jamie! But it sounds good, and at least me posting bumps the thread a bit...

Cheers Ste. I got a bit of time tomorrow to ave another play about with it! (After i've fixed a hole that has appeared in my inspection pit cover..)

[g8dhe]

My error its the 1997 that has the actual circuit diagram of the control;

The switches are two separate single pole change overs it seems, so it may be possible if the switches are so constructed that you can get at each pole separately that you could use the same method of wiring as used on the power Window winders;

but quite often these switches have a construction that won't let you get at all 6 poles independently, but you might be lucky! Its the same style of circuit (twice over) used for switching a landing light from two locations.

[jaylee]

Just an update.. I have managed to switch the wire on the back of the MX3 SR switch, so i only get live to the corresponding open or close channel depending on which direction pressed...
Easy job! Just cut the redundant green & soldered to the black A wire cut from where fitted!

Am i right in thinking, if i just tap into the existing open/close wires with B & C i will blow fuses??

[g8dhe]

Not sure if this will help or not! But see if it makes sense to you!! The upper switch is the new MX3 one with the wiring loom colours as shown in http://www.mx-3.com/manuals/showimg.php ... -M-006.gif you will need to connect them to Ground and the fused supply if they aren't already.

The bongo switch is the lower one with the wiring colours as shown here

Some changes to the wiring showning the Orange/Green went originally to chassis via the M1-02 connector, this needs to be changed and disconnected.
The main thing however is you need to get inside the physical switch and bring out the two new connections, previously they are shown connected together and coming out to connect to the Orange/Green wire in the loom you need to break them where the two "X"'s are shown - whether this is possible or not I have no idea as I don't have a switch to look inside

[jaylee]

Thanks Geoff, i really appreciate yer help.
Ran out of light today, but i got the morning off..! I will take a look.

Now, i have to be honest.. I am having real trouble reading the diagrams.. But i is learning..! But it looks like i have done the groundwork with the Bongo switch. (Just ain't had the b@lls to connect it up yet!) The wire color's do match up! (From memory.)
...& if i read the diagram right, I also need to ground the redundant Black from the MX3 switch..? (Which was cut & connected to green, & now only makes live when thrown to either open or closed.)

[g8dhe]

(Which was cut & connected to green,

What green wire are you referring to - there is a Green with Orange stripe but no Green on its own, unless the loom doesn't match the diagrams or maybe your talking about a wire internal to the light switch itself in which case nothing shows those colours in the diagrams!
The big problem is can you get into the Bongo switch to separate the two poles that are normally linked up, they may be built into the physical switch itself and not possible to separate

[jaylee]

(Which was cut & connected to green,

What green wire are you referring to - there is a Green with Orange stripe but no Green on its own, unless the loom doesn't match the diagrams or maybe your talking about a wire internal to the light switch itself in which case nothing shows those colours in the diagrams!
The big problem is can you get into the Bongo switch to separate the two poles that are normally linked up, they may be built into the physical switch itself and not possible to separate

I think it was the green with an orange stripe...? (Will check tomorrow, in the light.) It did run from the back of the SR switch & go to the connector block that ran to the separate courtesy light loom, but lead nowhere... It's that i cut & soldered to the black to make the wire live when switched, as opposed to a constant live on B & C the until continuity broke when switched when i first got it...

[jaylee]

Just thought i would put closure to this thread.. (& an opening!)

Job done this morning after getting in @ 5.30am from Manchester & 4 hours sleep!!



It is possible to break the switch connections marked X by cutting the earth wire from the Bongo switch & breaking a connection inside the actual switch between the two poles..
It was even possible to bring out new connections via the redundant back light bulb hole (They don't have one fitted to the SR switch.) & drilling a second hole opposite end for the second connection...

Both the MX3 & Bongo switch work independently of each-other..! No more groping for an out of sight switch when it starts to rain!!

So, i just leaves me to thank Geoff (g8dhe) Which when i printed out the diagram, realized must have put some time in drawing it up!!
It was a great help!

& my partner.. Who laid on a great breakfast & coffee.

[g8dhe]

Oh that's great I was concerned that it wouldn't be possible to get at the extra connections needed.

[jaylee]

Soldered to the poles... (Very tidily & as flat as possible.) Then the wire ran out of the adjacent hole (to the pole).. It doesn't even fowl the original connector, & there is still plenty enough clearance for the little metal rockers to break the appropriate contacts!

I cleaned up the contacts on the switch while i was at it..

The wire colour coding on the diagram was spot on too!