Reply With QuoteIndependent dedicated switched battery line? ECU power line?
Chris
Need help finding a power source.
So my electronic boost gauge needs a power source that is ignition-hot...but it has to STAY hot while the engine is cranking (key in "start" position). This is for the auto calibration function of the gauge.
I can't find anything that fits the bill. Hoping someone with more experience can help me out.
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
Independent dedicated switched battery line? ECU power line?
Chris
91 Miata (#3), Rattle Can Grey(previous owner), Greddy Turbo @7 PSI and Manifold (Only items remaining from the kit), TDR I/C, Godspeed Radiator, RM DP, 2.5 Enthuza Bipes, BEGI AFPR, ACT, Lightened Stock Flywheel, Yellow Konis, FCM on Stock Springs, HDM2S, MOMO Wheel, Ratsback Front CF Lip, Black Rota's on EcstaXS, Corrado Rotors & XP8's on Front w/ 1.8 rears.
http://austinmiata.com/
Wishlist: Megasquirt to run 12-13 PSI, White non-spray paint job, 8" 6UL's, RX7 LSD, Evans Waterless Coolant
Who makes the boost gauge and what does the instructions say?
Also, aren't the interior lights constant power as well?
Chris
91 Miata (#3), Rattle Can Grey(previous owner), Greddy Turbo @7 PSI and Manifold (Only items remaining from the kit), TDR I/C, Godspeed Radiator, RM DP, 2.5 Enthuza Bipes, BEGI AFPR, ACT, Lightened Stock Flywheel, Yellow Konis, FCM on Stock Springs, HDM2S, MOMO Wheel, Ratsback Front CF Lip, Black Rota's on EcstaXS, Corrado Rotors & XP8's on Front w/ 1.8 rears.
http://austinmiata.com/
Wishlist: Megasquirt to run 12-13 PSI, White non-spray paint job, 8" 6UL's, RX7 LSD, Evans Waterless Coolant
Whatever powers the ECU, fuel pump, ignition would be hot while cranking and while running.
Mike Walsted - Not an expert, just a data point.
1999 Miata
2003 MIata
1999 Miata
2001 Kia Rio
It's an autometer sport comp electronic gauge. Interior lights are constant. I need something that's only on with the key.Originally Posted by Miatamaniac92
Wouldn't ECU be constant hot and not switched? I'll look into fuel pump - that seems to make sense.
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
Radio?
2005 Lava Orange MSM #601/1428
211 rwhp, 195 ft. lbs on 1/6/07
That's where it's currently wired to. Radio gets no power when the key is in the "start" position.
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
I'm not an expert on the Miata ECU, but my guess would be that there would be two power sources to the ECU - one for keep alive memory, and another to power it, the injectors, and the spark when it needs to be running, sort of like most radios. I could be wrong, though.
Mike Walsted - Not an expert, just a data point.
1999 Miata
2003 MIata
1999 Miata
2001 Kia Rio
Ummm...what about that little blue plug (not sure of the correct name for it) on top of the wheel well on the driver's side? The one you connect to when checking timing? Isn't that one hot?
Not sure which one you're referring to. I've got a PDF of the full wiring diagram for the whole car now, so I'm sure I'll find something :)
Last edited by mk2tmr2; 08-22-2008 at 10:29 PM.
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
So it looks like the Light Green wire coming from the PCM on connector 3 position N is the signal to the fuel pump relay.
My question is do I tap into this wire for my power source or do I need to go for the Red and Blue (R/L) wire coming out the other side of the relay? I don't have much of a clue how to read these types of diagrams.
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
Bueller?
'96 "R2 Limited" | On Minkara
'99 s/c - Sold | Club Roadster Calendar Car: August 2011 | Roadster Garage Roadster of the Week
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