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Post by dottieshusband on Mar 19, 2023 12:53:57 GMT -5
Thought I'd check with the expurts... my port engine, 12v71, won't crank... was running, shut it down, went to restart.. and nothing. The ignition switch powers up, I checked the plunger switch for continuity when depressed, checked the starter circuit fuses... but nothing... no solenoid noises. Parallel solenoid works, shut down solenoid and I swapped out the ignition solenoid in the power box. I want to try directly jump the Delco MT50 from the battery, but not really sure which lugs to jump. The starter solenoid has 2 small lugs, and 2 large lugs. One large lug is grounded to the starter case, and the small lug above it has a black wire from the black negative starter wire. The other large lug has the red positive wire coming from the power box, and the small lug above it has a small red wire coming from the wiring loom. So if I run a hot wire direct from battery to the red big red lug on the starter, where would I need to jump it to test the starter?
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Post by dottieshusband on Mar 19, 2023 12:59:44 GMT -5
PS, i'll post a picture on Sams since I'm not smart enough to pst one here.
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Post by Avenger on Mar 19, 2023 14:10:46 GMT -5
Positive battery cable to the white wire, or red painted white, or taped, on the small terminal on the solenoid. Expect sparks.
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Post by dottieshusband on Mar 19, 2023 14:21:40 GMT -5
Thanks, I've a few more things to check, like is there 32v at the big red wire from the power box. I changed out the Guest isolator switch sometime back... but I'm guessing ill find 32v at the starter. I'm by myself for I can't hold the start plunger and check for voltage in the ER Power box.. I'm hoping it's not the starter or starter solenoid, It's only about a year or 2 old and it was a real pain to R&R
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Post by Avenger on Mar 19, 2023 16:38:15 GMT -5
Understand. It's probably not the starter if it's been working all along and you're suddenly getting zero response. More likely just a failed switch or relay.
Keep us updated.
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Post by dottieshusband on Mar 20, 2023 11:27:30 GMT -5
Still no joy on my no crank issue. Ignition switch test good, plunger switch good..34v everywhere and at starter. 34v at ignition solenoid in power box... the wiring diagram shows a 3/4 amp fuse after the ignition switch at FC4... wherever that is.. all the 20amp fuses in the power box test good.. where else would I find these little fuses?
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Post by dottieshusband on Mar 20, 2023 11:33:53 GMT -5
PS, it shows the fuse just downstream of terminal block TB3-2
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Post by dottieshusband on Mar 20, 2023 11:40:07 GMT -5
Are there any fuses inside the systems monitor box?
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Post by rsmith on Mar 20, 2023 15:52:26 GMT -5
Go buy a remote starter switch you can jump it right on the solenoid
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Post by dottieshusband on Mar 20, 2023 16:43:13 GMT -5
That's on tap for tomorrow. I checked the ignition solenoid in the ER power box, and there is 34v on one side, so I should be able to jump across those lugs to start. The problem is between the start plunger switch, and the ignition solenoid. The schematic shows a small fuse in there, but it's not obvious.. ill start tracing the wire tomorrow.. it says it's after TB-3, but the terminal blocks behind the helm both say PH-1 and PH-2.. problems like this drive me nuts.
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