chris 417 mi 24 2 Cars Posted July 12, 2006 Basically can anyone tell me which pin should be connected to what on the engine ? as i think i have finally traced the problem to the amp wiring ! At the moment i have an earth on the 7th socket hole in the plug whihc goes to nowhere oin the 6 pin amp ! can anyone help and tell which wires shoould be in which holes to double check ! Share this post Link to post Share on other sites
chris 417 mi 24 2 Cars Posted July 12, 2006 right ive checked the bx wiring diagram and its wired correctly but i dont seem to have a 12v supply from the ecu to the amp, the ecu pin itself is not outputting 12v. What would cause this ? Share this post Link to post Share on other sites
pug_ham 240 3 Cars Posted July 13, 2006 IIRC the ignition amp 12v doesn't come from the ecu but from an ignition switched live & there are two 12v feeds, another coming from the coil & then from the amplifier to the ecu. Looking in my BX Haynes pin 6 on the ignition amp does go to the ecu, pin #1. What ecu are you using? ML4.1 (two row) or M1.3 (three row)? Graham. Share this post Link to post Share on other sites
chris 417 mi 24 2 Cars Posted July 13, 2006 Ok the ecu only has motronic etched on the top Bosch serial number : 0 261 200 119 it is the two pin row ecu at the moment i have the wires in the following socket positions on the ign amp plug: 1. Coil negative 2. Amp earth 3. Empty 4. Coil positive 5 & 6 Linked together and this goes through a white plug back to the ecu on a thick green which at the other end appears to have a thick shield or insulation I havent traced the 3rd of the 3 wires at the coil to its origin but where should it come from anmd are the pins in the ign amp correct ? its the 6 pin unit. Share this post Link to post Share on other sites
pug_ham 240 3 Cars Posted July 13, 2006 Ok the ecu only has motronic etched on the top Bosch serial number : 0 261 200 119 BX GTi 1.9 litre 16 Valve 87-89 Bosch Motronic ML4.1 0 261 200 119 All Mi's are motronic. I think all your wiring is correct, just checked the BX loom I have & its the same. pin 1; coil plug pin #2. pin 2; Amp earth. pin 3; empty. Pin4; coil plug pin #3. Pin 5; ECU plug pin #1. Pin6; ECU plug pin #1. Graham. Share this post Link to post Share on other sites
chris 417 mi 24 2 Cars Posted July 13, 2006 hmm ..so why should i have no voltage from the amp to the ecu ? someone mentioned 2 supplies, a switched and non switched....welll the blue wire near the amp loom with the spade connector on is in the power distribution block which fixes to the passenger side of the slam panel, which is the other ? (i assumed the other would be the actual battery terminal positive itself Share this post Link to post Share on other sites
chris 417 mi 24 2 Cars Posted July 13, 2006 anyone shed any light on this ?? please ??? this car has been sat on stands now for a month and she is getting impatient to be moving Share this post Link to post Share on other sites
jackherer 543 Posted July 13, 2006 hmm ..so why should i have no voltage from the amp to the ecu ? someone mentioned 2 supplies, a switched and non switched....welll the blue wire near the amp loom with the spade connector on is in the power distribution block which fixes to the passenger side of the slam panel, which is the other ? (i assumed the other would be the actual battery terminal positive itself the blue one going to the distribution box is right, the other 12v feed connects to a two pin multiplug on the loom near the ignition amp, its the thick yellow wire, the second wire there is a thinner green one that is the tacho drive. Share this post Link to post Share on other sites
chris 417 mi 24 2 Cars Posted July 13, 2006 yeah have both of them, i have everything but 12 v from/to pin 1 on the ecu ! why would this not send /recieve 12 v ? Share this post Link to post Share on other sites
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