Join Date: Dec 2017
Location: Escanaba, MI, 49829
Feedback Score: 0 reviews
Sorry to bother you, but wanted to get some confirmation that I was doing a test you prescribed right. I have an IDI '89 F350 that I just dragged home. I saw this set of tests that you recommended. Wanted to see if it sounded like I was doing it right.
"Fender starter solenoid/relay. Put the meter set at 12VDC or above that, VOM Positve lead on the 90* wire on side of solenoid/relay, turn key to start. Does the VOM show ~12.5 VDC?
NO Key switch is bad or intermittent.
Fender starter solenoid/relay. Put the meter set at 12VDC or above that, VOM Positive lead on the solenoid to starter terminal or wire, Neg. lead on battery Neg. post, pull the 90* key wire off, small terminal on the side, with a jumper wire from battery Pos, touch the other end to the 90* key terminal.
Does the starter turn the engine over. YES starter and solenoid is good. NO Do you have a 12VDC meter reading? NO solenoid is bad. YES Solenoid on starter could be bad, starter itself could be bad."
First part of the test: When I turned the key on, with the red (+) lead on the 90 degree wire post (with the wire still connected), and the black lead of the tester on the battery (-) post (it didn't specify what to do with the black lead, so I went with this...), upon turning the key it was showing about 10.5 V on the VOM. Is this near enough to the specified 12.5, or problematic? I WAS doing this myself, so had the leads connected as well as I could hope, with the VOM lying on the air cleaner so I could see it from inside the cab. IF this indicates the key switch is bad, is there a way to "jump" the solenoid to get the engine to turn over? Because I have tried that at the solenoid on the fender wall and gotten nothing. I have NOT tried that at the starter solenoid yet.
I connected the VOM with the red lead to (+) (red cable directly from the battery (+) post) terminal ON the solenoid, and the black lead to the (-) terminal post on the battery itself. I then took loose the small, red wire that has the 90 degree elbow bend connector from a SMALL post on the solenoid. I took a length of wire (about 12"), and ran it from (+) battery post to the small terminal ON THE SOLENOID (NOT to the end of the loose wire with the 90 degree elbow). When I did this I got NO starter turn, but DID get an audible and repeatable click from the solenoid itself. Also, upon doing this, my VOM continued to read with DC Voltage. It was showing about 12.65 before connecting the jump wire, and dropped down to about 12.60 or 12.59 while holding the jump wire to the solenoid, but did continue to show DC Voltage.
If I am reading correctly, this indicates that the problem is down on the starter solenoid or starter itself, correct?
Or if I did part of this test wrong, please let me know and I will redo it.
Thanks for any help. I appreciate your knowledge and assistance.
J. M. Shaw, II, D.C.
1988 International Harvester S1654 Retired UHaul truck
(Converted to Flatbed Hauler-ish)
IDI 7.3 International Diesel, 5-Speed
1989 F-350 XLT Lariat, CC, DRW, 2WD
IDI 7.3, Auto, Charity Auction Find!
Last edited by jmshawii; 02-25-2018 at 05:43 PM.
Reason: Updated Information