RichP Posted September 1, 2008 Share Posted September 1, 2008 finally getting stuck in to the wiring (ok, so I'm slow...!) On the Ford VR sensor as pictured in post #25 in this thread there are two wires - one blue with a yellow stripe and one blue with a red stripe (might not be red but I'm colour blind !). Anyone know which one is positive and which one negative, or does it even matter? Cheers Rich Quote Link to comment Share on other sites More sharing options...
cng1 Posted September 2, 2008 Share Posted September 2, 2008 Here's a diagram of the wiring: http://www.extraefi.co.uk/Drawings/Ford_vr_connector.GIF One way round it will work, the other it won't so it should be pretty obvious if it is wrong. Quote Link to comment Share on other sites More sharing options...
RichP Posted September 2, 2008 Share Posted September 2, 2008 Excellent Chris - thank you Quote Link to comment Share on other sites More sharing options...
RichP Posted September 12, 2008 Share Posted September 12, 2008 It flippin' works! Started first time on the "safe" limphome mode - now need to hook up the ECU - all the wiring is done so should be ok Question tho - the TPS I have requires a 5v supply from the megajolt ecu. I don't know if the V-Ref (pin 6) output from the ecu is 12v or 5v - anyone know? If it's 12v, what do I do? Don't want to fry it as soon as I plug it in. Cheers Rich Quote Link to comment Share on other sites More sharing options...
Blatman Posted September 13, 2008 Share Posted September 13, 2008 Can't you just measure it with a multi meter? Quote Link to comment Share on other sites More sharing options...
RichP Posted September 13, 2008 Share Posted September 13, 2008 Yap, realised that as soon as I wrote the post! If it's 12v I'm not sure what to do tho. I'll check first and worry later! Edited to add for the reference of future readers: it's a 5v output. Quote Link to comment Share on other sites More sharing options...
RichP Posted September 13, 2008 Share Posted September 13, 2008 All done and 3D seems to be working fine as well - chuffed to bits. I have 2 wires not connected to anything that I'm not sure about: Pin 4 - "Option" - Indicates ignition configuration 1 or 2. Connect to ground if only 1 used. This is currently not connected to anything - does it matter or should I earth it? If I want to run 2 maps, what should it be connected to to trigger the second map? Pin 13 - "Rev Lim" - Open circuit until active, then grounded. This is currently not connected to anything - if I want the rev limiter to work, should I connect this to earth? Many thanks Rich Quote Link to comment Share on other sites More sharing options...
minisweeper Posted September 13, 2008 Author Share Posted September 13, 2008 You can get a pretty standard on off switch from somewhere like maplins to connect to your option input and also to ground - therefore 'on' should be 1 and 'off' should be 2 or whatever. Great feeling when it fires up first time isnt it! Have you connected all your aux outputs up then? I haven't bothered with mine. Quote Link to comment Share on other sites More sharing options...
RichP Posted September 13, 2008 Share Posted September 13, 2008 Yep - couldn't believe it when it started - I was terrified that I'd have connected something wrong as I soldered and bound all the connections - would have been a right pain if I'd made a mistake somewhere! No aux outputs yet - just a bunch of wires! I have a set of 3 LED's to turn into shift lights when I get round to it. The only thing I haven't checked is that the trigger wheel is correctly aligned so that in limp home mode it fires at 10 degrees btdc as I don't have a timing strobe, but is seems to run ok. Certainly much smoother, most of the popping and banging has gone on the over-run. What did you hook your rev limiter output to - earth? I'd like that to work as I used to have one on the coil and the engine seems keen to rev past a point that I think is safe. Quote Link to comment Share on other sites More sharing options...
minisweeper Posted September 13, 2008 Author Share Posted September 13, 2008 I dont have my rev limited connected - in the guide it mentioned something which was starting to sound complex (I think it needs an additional board?) and it has a soft limiter built in so I thought i'd just rely on that. I have a shift light on my digital dash set at somewhere in the high 5's (i think) which I assume is suitable enough. Quote Link to comment Share on other sites More sharing options...
Hammy Posted September 14, 2008 Share Posted September 14, 2008 There is an output from the EDIS module for the rev counter I just connected mine to that and it worked !! I used small LEDS ( actually an adapted LED torch) to give me a shift light. One side of the led is connected to a 1k ohm resistor to an ignition switched positive the other side connected to a programmable output. By hacking the inside of the torch I swapped some leds for green and red ones to give me a three stage shift light using 3 programmable outputs from the Mega jolt. If you are not happy with that use a standard relay connected to a positive supply and the MJ output and switch the lamp of your choice. I have not bothered with a rev limiter. Quote Link to comment Share on other sites More sharing options...
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