16v Mini Club Forums  

Go Back   16v Mini Club Forums > General Public Area > General 16v Mini Chat

Thread Tools Display Modes
Old 11-02-2019, 02:11 PM   #1
Senior Member
monkey's Avatar
Join Date: Jul 2010
Location: London
Posts: 907
Subframe: Allspeed
CC: 1600
Make: Honda
ECU: A box of chips
Default MPI Wiring Ignition Diagram/Questions

Hi all,

I've been studying the mpi wiring diagrams. Both Haynes and the Rover circuit diagrams (you can find pdf of them online). They both show how the power is provided from the ignition switch. Bit confused as it shows more than what I've seen before position 1, 2 and crank normally in my laymans terms.

In Rover manual


In Haynes


Seems the powers double up on the Rover mpi ignition switch?
What are the following and when are they powered? I'm guessing the one with the dots and line connecting across shows where the power comes in and stays when the key is turned?


Also, just to clarify when is Aux powered?

I'm planning to use the loom for my honda build. Ripping out all the MEMs relay stuff.

Any recommendations on where I should take the Perm 12+, Switched 12+ for the Honda ECU? It seems like the MEMs relay is powered switched 12+ on fuse A4 and a perm live straight from the engine bay fuse box to the Mems relay which then feeds the ECU. Would I drop the 30amp fuse to something smaller for the Honda ecu?

Last question, is the wiring for the starter motor and alternator within the main body loom on an mpi or the engine loom?

Sorry if the questions come across basic and newbie, I dont usually do wiring all that well but trying to get stuck in properly this time round.

An expert is someone who tells you why you can't do something- Alec Issigonis
monkey is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 05:04 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.