Engine starts but no signal to the dash?
Hey guys just swapped in a new motor. Motor fires up but im not getting any RPM's or anything on there. Not even my E brake light. But they do light up when i turn the headlights on. Is there a fuse for that? A buddy of mine said it could be my ECU?
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Hook up the grounds you forgot to hook up.
/thread. |
grounds are hooked up. It doesn't start unless they are...
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i need to know this also.
Mine packed up on a track day. Turn signals, dials and reverse lights all packed up together. Checked all fuses and no issues there. Beggining to run out of ideas. Definately sounds identical though. |
Depends on year of car.
'90 to '93 there's a yellow/blue wire going from the igniter to the tach and diagnostic box. '94-'95.5 (cars with four wire coils) the wire is black/white and comes off both coils in parallel. '95.5-'97 the black/white wire comes from the ECU. '99-'05 it's a green/orange wire from the ECU. |
does this wire (dependant on year) have anything to do with the turn signals and fuel gauge etc though (and reverse light)
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Yes. Those two signal are modulated onto the tach wire using a simple FSK algorithm. At the dash, a low-pass filter strips out the turn signal/fuel gauge signal for the tachometer feed, and a simple DC blocking cap is used to feed the FSK signal into a decoder which then derives the fuel and turn indicator data.
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im not even gunna lie to you that I understand a word of that, but at least I know what wire too look at first.
Thanks :) Also oil pressure guage and temp gauge dont work so im assuming this will probably be the same wire too. Cheers I'll go look later |
could this be a problem with my megasquirt wiring as i remember needing to jump some pins with a resistor for the rev counter to work.. would this stop the other dials working too ??
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Originally Posted by Skuzzle
(Post 404015)
im not even gunna lie to you that I understand a word of that, but at least I know what wire too look at first.
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Originally Posted by Skuzzle
(Post 404603)
could this be a problem with my megasquirt wiring as i remember needing to jump some pins with a resistor for the rev counter to work.. would this stop the other dials working too ??
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Originally Posted by Joe Perez
(Post 404722)
Just so we're clear, every word of my last post was complete BS.
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sorry, its a 94 jap import 1.8
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I had a similar problem after I changed my clutch. I oopsed the neutral and reverse sensors which caused a fuse in the driver footwell to go out. Just a thought.
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unfortunately i've checked all the fuses and all are good
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bump?
i have the same problem... only mine wont start either. My Haltech shows an RPM signal but the dash tach doesnt move at all. I'm making a new a post though (hijacks be damned) |
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