Anyone have specific advice on splicing the '91 DSM harness to the D50.
?where does the d50 ignition switch wire in?
?how do you wire the fuel pump (MSD inline) relay?
?in the harness I pulled, the alternator wires are part of a separate harness that goes to the engine bay fuse/relay box-how do I make that work?
any advice, pic or diagrams would be greatly appreciated
D50 Wiring
Moderators: DJpowerHaus, mattmartindrift
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DJpowerHaus
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DJpowerHaus
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Where does the d50 ignition switch wire in?
Trace the wire from the key switch (ON position)
How do you wire the fuel pump (MSD inline) relay?
Trace the wire that runs from pin 2 on the DSM Main Relay:
Then run a thick gauge wire from the end of that wire to the + of the fuel pump.
in the harness I pulled, the alternator wires are part of a separate harness that goes to the engine bay fuse/relay box-how do I make that work?
Mitsu alternators (and mostothers) have 3 pins. I've given them names that I remember, but my not be correct: (B) the Big wire to the battery, (L) alternator Light, and (S) the Signal wire from the battery to the voltage regulator in the alternator. You'll need to trace out the alternator light from the dash to find that wire. You NEED this light to be hooked up or your battery won't charge. The big wire goes to the battery. Try to work with the stock charging system to retain its safety features. The Signal wire goes to the battery as well. This makes sure that its butting out 14v or so to charge the battery.
Hope all this helps. Sorry to say, but unless you have a manual with circuit diagrams, you'll need to trace out wires with an ohm meter.
Trace the wire from the key switch (ON position)
How do you wire the fuel pump (MSD inline) relay?
Trace the wire that runs from pin 2 on the DSM Main Relay:
Then run a thick gauge wire from the end of that wire to the + of the fuel pump.
in the harness I pulled, the alternator wires are part of a separate harness that goes to the engine bay fuse/relay box-how do I make that work?
Mitsu alternators (and mostothers) have 3 pins. I've given them names that I remember, but my not be correct: (B) the Big wire to the battery, (L) alternator Light, and (S) the Signal wire from the battery to the voltage regulator in the alternator. You'll need to trace out the alternator light from the dash to find that wire. You NEED this light to be hooked up or your battery won't charge. The big wire goes to the battery. Try to work with the stock charging system to retain its safety features. The Signal wire goes to the battery as well. This makes sure that its butting out 14v or so to charge the battery.
Hope all this helps. Sorry to say, but unless you have a manual with circuit diagrams, you'll need to trace out wires with an ohm meter.
Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
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DJpowerHaus
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I think she is just trying to motivate me-I've been really busy-but I'm not taking any chances.
So i've been tracing wires and studying diagrams. Do any of these wiring plans sound suspect?
'84 D50, '91 DSM ECU and turbo harness.
1) STARTER CIRCUIT: Using the stock D50 starting circuit. Plan to connect the wire called "to starter relay" from the DSM main relay to the starter solenoid so it is hot when ignition in "Start" so relay allows the fuel pump (MSD inline) to run via pin 2 from the MR. Once running I assume the singnal from the ignition power coil into pin 109 will allow the signal from pin 56 (fuel pump control) to keep the relay closed. Not sure how pin 13 (fuel pump drive signal ) fits in but i'll be sure it is intact.
2) IGNITION CIRCUIT: Ignition "On" wire from the D50 harness will tie into pin 110 of DSM ECU, the B/W wire to the MR (?pin#) and the B/W wire to the coil and power transistor.
3) CHARGING CIRCUIT: Wire from Bat terminal on alternator to pos bat terminal through 80A fuse. From L terminal connect to the ignition "On" wire via the DSM alternator relay. Will then tie in wire for dash charging light to the L terminal too. From S terminal will tie into to the D50 fuse box where stock wire is alreay connected.
4) HOT AT ALL TIMES: I plan on using a spare fuse box wired directly from pos bat terminal (or bat wire on alternator) to route "hot at all times" to ingition switch, R/B wire to MR (?pin #), Pin 105 on DSM ECU.
5) QUESTION: Where does pin 18 get input (Vehicle Speed Sensor). If I don't have any signal there will it matter?
6) QUESTION: Is the oil pressure sensor part of the engine control signals or can I just use the stock D50 wire to the dash and bypass the DSM harness.
Anyone see major errors? I am most unsure about the charging circuit.
So i've been tracing wires and studying diagrams. Do any of these wiring plans sound suspect?
'84 D50, '91 DSM ECU and turbo harness.
1) STARTER CIRCUIT: Using the stock D50 starting circuit. Plan to connect the wire called "to starter relay" from the DSM main relay to the starter solenoid so it is hot when ignition in "Start" so relay allows the fuel pump (MSD inline) to run via pin 2 from the MR. Once running I assume the singnal from the ignition power coil into pin 109 will allow the signal from pin 56 (fuel pump control) to keep the relay closed. Not sure how pin 13 (fuel pump drive signal ) fits in but i'll be sure it is intact.
2) IGNITION CIRCUIT: Ignition "On" wire from the D50 harness will tie into pin 110 of DSM ECU, the B/W wire to the MR (?pin#) and the B/W wire to the coil and power transistor.
3) CHARGING CIRCUIT: Wire from Bat terminal on alternator to pos bat terminal through 80A fuse. From L terminal connect to the ignition "On" wire via the DSM alternator relay. Will then tie in wire for dash charging light to the L terminal too. From S terminal will tie into to the D50 fuse box where stock wire is alreay connected.
4) HOT AT ALL TIMES: I plan on using a spare fuse box wired directly from pos bat terminal (or bat wire on alternator) to route "hot at all times" to ingition switch, R/B wire to MR (?pin #), Pin 105 on DSM ECU.
5) QUESTION: Where does pin 18 get input (Vehicle Speed Sensor). If I don't have any signal there will it matter?
6) QUESTION: Is the oil pressure sensor part of the engine control signals or can I just use the stock D50 wire to the dash and bypass the DSM harness.
Anyone see major errors? I am most unsure about the charging circuit.
Brake boosters should NOT NOT!!!! see boost.
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DJpowerHaus
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1Gs can run with half the sensors not there. They usually dont even throw codes. The oil pressure sender is not used by the ECU at all.. its fine to run any way you see fit. The VSS isnt needed by the ECU. I'm too tired to really read it all over.. arg
Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
<!--QuoteBegin-DJpowerHaus+Oct 18 2005, 06:07 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (DJpowerHaus @ Oct 18 2005, 06:07 PM)</td></tr><tr><td id='QUOTE'><!--QuoteEBegin--> 1Gs can run with half the sensors not there. They usually dont even throw codes. The oil pressure sender is not used by the ECU at all.. its fine to run any way you see fit. The VSS isnt needed by the ECU. I'm too tired to really read it all over.. arg [/quote]
lol. way to cop out. i sort of need to know this stuff too. answer it matt!!
lol. way to cop out. i sort of need to know this stuff too. answer it matt!!
THE ENGINE RAN TODAY!!
Below I made some edits to reflect what actually works.
'84 D50, '91 DSM ECU and turbo harness.
1) STARTER CIRCUIT: Using the stock D50 starting circuit. Plan to connect the wire called "to starter relay" from the DSM main relay to the starter solenoid so it is hot when ignition in "Start" so relay allows the fuel pump (MSD inline) to run via pin 2 from the MR. Once running I assume the singnal from the ignition power coil into pin 109 will allow the signal from pin 56 (fuel pump control) to keep the relay closed. Not sure how pin 13 (fuel pump drive signal ) fits in but i'll be sure it is intact.
BELIEVE IT OR NOT THIS WORKS, FUEL PUMP COMES ON WHEN STATER CIRCUIT IS HOT AND THEN STAYS ON IN THE IGNITION ON KEY POSITION AS LONG AS THE ENGINE IS RUNNING.
2) IGNITION CIRCUIT: Ignition "On" wire from the D50 harness will tie into pin 110 of DSM ECU, the B/W wire to the MR (PIN 3) and the B/W wire to the coil and power transistor.
WORKS BUT FOR SOME REASON IGNITION IS ALWAYS HOT, SO I HAVE TO DISCONNECT THE WIRE TO KILL THEN ENGINE-NEED TO LOOK AT MY WIRING AGAIN.
3) CHARGING CIRCUIT: Wire from Bat terminal on alternator to pos bat terminal through 80A fuse. From L terminal connect to the ignition "On" wire via the DSM alternator relay. Will then tie in wire for dash charging light to the L terminal too. From S terminal will tie into to the D50 fuse box where stock wire is alreay connected.
HAVEN'T TESTED THIS CIRCUIT YET.
4) HOT AT ALL TIMES: I plan on using a spare fuse box wired directly from pos bat terminal (or bat wire on alternator) to route "hot at all times" to ingition switch, R/B wire to MR (?pin #), Pin 105 on DSM ECU.
INITIALLY FORGOT TO WIRE THIS AND THE ENGINE TURNED OVER AND OVER UNTIL I REALIZED I HAD TO POWER THE ECU. WORKS FINE AFTER THAT.
5) QUESTION: Where does pin 18 get input (Vehicle Speed Sensor). If I don't have any signal there will it matter?
I STILL DO NOT KNOW WHERE THE VSS SIGNAL COMES FROM-DOES ANY ONE KNOW?
Below I made some edits to reflect what actually works.
'84 D50, '91 DSM ECU and turbo harness.
1) STARTER CIRCUIT: Using the stock D50 starting circuit. Plan to connect the wire called "to starter relay" from the DSM main relay to the starter solenoid so it is hot when ignition in "Start" so relay allows the fuel pump (MSD inline) to run via pin 2 from the MR. Once running I assume the singnal from the ignition power coil into pin 109 will allow the signal from pin 56 (fuel pump control) to keep the relay closed. Not sure how pin 13 (fuel pump drive signal ) fits in but i'll be sure it is intact.
BELIEVE IT OR NOT THIS WORKS, FUEL PUMP COMES ON WHEN STATER CIRCUIT IS HOT AND THEN STAYS ON IN THE IGNITION ON KEY POSITION AS LONG AS THE ENGINE IS RUNNING.
2) IGNITION CIRCUIT: Ignition "On" wire from the D50 harness will tie into pin 110 of DSM ECU, the B/W wire to the MR (PIN 3) and the B/W wire to the coil and power transistor.
WORKS BUT FOR SOME REASON IGNITION IS ALWAYS HOT, SO I HAVE TO DISCONNECT THE WIRE TO KILL THEN ENGINE-NEED TO LOOK AT MY WIRING AGAIN.
3) CHARGING CIRCUIT: Wire from Bat terminal on alternator to pos bat terminal through 80A fuse. From L terminal connect to the ignition "On" wire via the DSM alternator relay. Will then tie in wire for dash charging light to the L terminal too. From S terminal will tie into to the D50 fuse box where stock wire is alreay connected.
HAVEN'T TESTED THIS CIRCUIT YET.
4) HOT AT ALL TIMES: I plan on using a spare fuse box wired directly from pos bat terminal (or bat wire on alternator) to route "hot at all times" to ingition switch, R/B wire to MR (?pin #), Pin 105 on DSM ECU.
INITIALLY FORGOT TO WIRE THIS AND THE ENGINE TURNED OVER AND OVER UNTIL I REALIZED I HAD TO POWER THE ECU. WORKS FINE AFTER THAT.
5) QUESTION: Where does pin 18 get input (Vehicle Speed Sensor). If I don't have any signal there will it matter?
I STILL DO NOT KNOW WHERE THE VSS SIGNAL COMES FROM-DOES ANY ONE KNOW?
That is a great diagram, the prob is I know where the signal goes into the ECU, even have the wire labeled but I can't tell where it comes from. Did it plug into the DSM chasis harnes or go to a sensor near the motor? (pinout chart says "reed valve") Still no real reason to know unless I get DSM link in the future but I can't sleep well at night thinking about this wire (and about 4 billion others but that's another story.)
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DJpowerHaus
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It was NOT on the brakes on the 1Gs.
The 1G DSMs had the speedometer cable go from the transmission to the speedometer.. the reed valve thing is in the gauge cluster and generates the VSS signal from there which is then sent to the ECU. So basically.. the wire goes from the Starion dash's B22 plug through the chassis and out B38 to the Engine harness and ECU.
Not sure about 2Gs, but I suspect they do have a sensor on the hubs.
The 1G DSMs had the speedometer cable go from the transmission to the speedometer.. the reed valve thing is in the gauge cluster and generates the VSS signal from there which is then sent to the ECU. So basically.. the wire goes from the Starion dash's B22 plug through the chassis and out B38 to the Engine harness and ECU.
Not sure about 2Gs, but I suspect they do have a sensor on the hubs.
Getting the engine bolted in is about 10% of the way there.
The next 80% can go quickly with help and skill.
That last 10% takes about as long as the 90% that came before it.
thatll teach me to check my posts. i meant to say 2gs. yeah ive had to replace my speed sensor in my 1g before so i knew where that wasDJpowerHaus wrote:It was NOT on the brakes on the 1Gs.
The 1G DSMs had the speedometer cable go from the transmission to the speedometer.. the reed valve thing is in the gauge cluster and generates the VSS signal from there which is then sent to the ECU. So basically.. the wire goes from the Starion dash's B22 plug through the chassis and out B38 to the Engine harness and ECU.
Not sure about 2Gs, but I suspect they do have a sensor on the hubs.
