Sup3rL4m3r
Member
- :
- Mazdaspeed Protege
SOLVED SOLVED SOLVED
Called Prosport today and here's the problem:
The Premium Prosport Gauges (with the 2 molex daisy chain harness plugs) can't be spliced directly to the Performance Prosport Gauge harness (single, large harness). Refer to the diagram way down in the old post to see the fail.
Solution:
Regardless of what the flimsy white paper instructions says, you must wire the EGT red and white wires BOTH to the switched power, and the orange to the panel switch (if you want white/amber).
If you want to MIX Premium Gauges (Peak Memory) with Performance Gauges by SPLICING in order to share the wiring, use the diagram below.
BTW - Link to the Ignition Harness Wiring Diagram.
-----Begin the old post-----
Thanks to all who posted how-tos on the forum for gauge install - ya got me this far, but now I could use a hand with my gauge install.
I followed the how-tos + lots of searching got me a ignition harness wiring diagram. Used taps, spade connectors and voltmeter to test continuity and voltage for each connection. I daisy-chained the EGT to the boost gauge by splicing the molex'd harness from the boost gauge into the wiring harness for the EGT. Here's my set up...
Problem is - The EGT Gauge stays on all the time - even though the boost gauge works fine. All color modes work fine.
This is what you get when connecting the gauge to the wiring with the ignition off...
Gauges power-up fine in accessory mode.
And this is the working fine daytime mode...
And the working night mode (With the lights switched on)...
And then I turn off the ignition and now the EGT stays on but now it's amber...
Any help would be appreciated.
Called Prosport today and here's the problem:
The Premium Prosport Gauges (with the 2 molex daisy chain harness plugs) can't be spliced directly to the Performance Prosport Gauge harness (single, large harness). Refer to the diagram way down in the old post to see the fail.
Solution:
Regardless of what the flimsy white paper instructions says, you must wire the EGT red and white wires BOTH to the switched power, and the orange to the panel switch (if you want white/amber).
If you want to MIX Premium Gauges (Peak Memory) with Performance Gauges by SPLICING in order to share the wiring, use the diagram below.

BTW - Link to the Ignition Harness Wiring Diagram.
-----Begin the old post-----
Thanks to all who posted how-tos on the forum for gauge install - ya got me this far, but now I could use a hand with my gauge install.
I followed the how-tos + lots of searching got me a ignition harness wiring diagram. Used taps, spade connectors and voltmeter to test continuity and voltage for each connection. I daisy-chained the EGT to the boost gauge by splicing the molex'd harness from the boost gauge into the wiring harness for the EGT. Here's my set up...

Problem is - The EGT Gauge stays on all the time - even though the boost gauge works fine. All color modes work fine.
This is what you get when connecting the gauge to the wiring with the ignition off...

Gauges power-up fine in accessory mode.
And this is the working fine daytime mode...

And the working night mode (With the lights switched on)...

And then I turn off the ignition and now the EGT stays on but now it's amber...

Any help would be appreciated.
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