E38 ECM, Tach not working
05-20-2011, 06:02 PM
#1
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E38 ECM, Tach not working Just finished my LY6 swap into my ****** MB.
I connected the tach as it was with the LM7 but now it does not work.
I read something about a 680 ohm resistor....but could not understand.
Can anyone explain me this please....but like I`m a 1st grade student
I connected the tach as it was with the LM7 but now it does not work.
I read something about a 680 ohm resistor....but could not understand.
Can anyone explain me this please....but like I`m a 1st grade student
Last edited by svaras; 05-20-2011 at 06:08 PM.
05-21-2011, 10:34 AM
#2
TECH Resident
Normally if you connect a 680 ohm or 1k ohm resistor between the tacho input and 12V, you get a successfully operating tacho.
