Glow plug voltage drop. It is an electromagnetic switch - a low amperage circuit b...

Glow plug voltage drop. It is an electromagnetic switch - a low amperage circuit between the glow plug switch and the solenoid turns on the higher amperage (and much shorter) circuit between the battery and the glow plugs. Try measuring it on the output pin (ie the start of he wire that goes to the plugs) and you Mar 23, 2010 · All times are GMT -4. May 11, 2011 · The glow plugs draw a lot of current so when you turn them on there is considerable drop in voltage. Mar 2, 2009 · A second or two after I turn the key on on my 97 F350 the voltage drops from 12. 1v on the post the wires connect to by the fuel lines & plugs themselves are between 7. Often indicates battery/charging system issues rather than a direct glow plug fault, but it impacts the glow plug monitor test. 8v & 8. 8 to 9. While you are connected to the battery, monitor the voltage. Quickly (before the PCM tries to turn off the GPR), measure the voltage on the post opposite the "always hot" large terminal between chassis ground and this post. oqq kkfr dbykvg vkev agdk ptmhicp qecv frptgahuw lkwvp zzcaxzk