MS3Pro ULTIMATE adds nearly 50% more I/O with the addition of a third AMPSEAL 23-pin, 8′ flying lead. Harness arrives with color-coded, printed wires per the pinout below (black center connector)
***Center Harness ONLY in this listing, intended for people upgrading from MS3Pro Evo with no other changes needed, or from MS3Pro Gen1 (which requires only a few changes to wiring on the white/grey connectors)
Is the center connector required to run MS3Pro ULTIMATE?
No, but why leave nearly half of your available inputs and outputs on the table? At MINIMUM, pin #23 of the MS3Pro ULTIMATE must be connected to 12V+ battery power. See pinout for I/O possibilities with the center harness.
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The MS3Pro ECU’s feature user-replaceable fuses that protect against voltage spikes and other abuse. To replace these fuses, use a needle nose pliers to pull the fuse out of its holder, and then push in the replacement fuse by hand.
This is the 6000m...
Planning to make your own ULTIMATE harness? This plug and pin kit features the MS3Pro ULTIMATE AMPSEAL white, black & gray connectors, plus 100 pins- more than enough for making your own!
(EVO/ 1st Gen 2-connector AMPSEAL Kit sold separately)
Metal DB37 Cover with Hardware and Gaskets
This Metal DB37 cover is perfect for building up your own Megasquirt wiring harness or relay cable connector.
The MS3Pro ECU’s feature user-replaceable fuses that protect against voltage spikes and other abuse. To replace these fuses, use a needle nose pliers to pull the fuse out of its holder, and then push in the replacement fuse by hand.
This is the 375...
This electronic boost control solenoid can be used with the MS3-Pro/MSPNP as well as any DIY Style MegaSquirt EMS (with the appropriate mods), or with other electronic boost controllers to control boost by adjusting the pressure to a turbo wastegate. Th...
MegaSquirt Wiring Bundle
8' TXL wire, color coded with labeling printed on the wire every 3 inches -- no paper tags here!
IAC and Ignition wires are included for MS-I / MS-2 use (or MS-3 Primary Harness use)
Shielded Ignition input wire
Grea...
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1 review for MS3Pro ULTIMATE Center Harness