 Electrical Issue After Engine Drop |
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| HerdofCrickets |
 Aug 12 2019, 12:20 PM
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#1
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Member  Group: Members Posts: 68 Joined: 23-September 16 From: Overland Park, KS Member No.: 20,423 Region Association: None  |
Dropped the engine last fall, had it rebuilt and we put it back in a month or so ago.
After having a little boy a few months ago, I'm finally getting a little time to get back to work on the 914. Engine itself runs great, exhaust is really rich... so I guess the carb needs adjusted a little. One issue though... no power to the dash (tach doesn't work and radio doesn't turn on). Also when I turn the key, the engine tries to turn over but only fires when you let off the key. Pretty sure I must have a wire hooked up wrong... I'll start working backwards tonight but if anyone has any ideas... that'd be fantastic! -Jon |
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| 76-914 |
Aug 12 2019, 02:06 PM
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#2
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,482 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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QUOTE(HerdofCrickets @ Aug 12 2019, 11:20 AM)  Dropped the engine last fall, had it rebuilt and we put it back in a month or so ago. After having a little boy a few months ago, I'm finally getting a little time to get back to work on the 914. Engine itself runs great, exhaust is really rich... so I guess the carb needs adjusted a little. One issue though... no power to the dash (tach doesn't work and radio doesn't turn on). Also when I turn the key, the engine tries to turn over but only fires when you let off the key. Pretty sure I must have a wire hooked up wrong... I'll start working backwards tonight but if anyone has any ideas... that'd be fantastic! -Jon I had that same experience with the ignition switch. Put a new battery in and that did the trick. What kind of voltage are you seeing at the battery. Is the blk wire w/ purple stripe connected at the coil? |
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| HerdofCrickets |
Aug 12 2019, 03:22 PM
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#3
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Member Group: Members Posts: 68 Joined: 23-September 16 From: Overland Park, KS Member No.: 20,423 Region Association: None |
QUOTE(76-914 @ Aug 12 2019, 03:06 PM) I had that same experience with the ignition switch. Put a new battery in and that did the trick. What kind of voltage are you seeing at the battery. Is the blk wire w/ purple stripe connected at the coil? Black wire with purple strip is not connected; reading the wiring diagram it looks like that is for the tach... so that makes sense. I read that it goes to the negative side of the coil; can someone confirm? I've already fried that little chip inside the distributor twice (IMG:style_emoticons/default/smile.gif) Not sure how to check battery voltage; i'll have to google that and respond when I get home later. I was thinking I had the ignition wire on the circuit board plugged into the wrong slot, I need to check... I think it's plugged into slot II (bottom left of this diagram) but need to confirm and read the difference between Slot IV and Slot II https://imgur.com/a/RjFnTXr Attached thumbnail(s) 
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| ClayPerrine |
Aug 12 2019, 05:24 PM
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#4
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Life's been good to me so far..... Group: Admin Posts: 15,392 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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Black with purple wire goes to the negative terminal on the coil.
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| Mike Bellis |
Aug 12 2019, 10:02 PM
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#5
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Bad tranny ground.
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| HerdofCrickets |
Aug 13 2019, 07:09 AM
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#6
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Member Group: Members Posts: 68 Joined: 23-September 16 From: Overland Park, KS Member No.: 20,423 Region Association: None |
QUOTE(Mike Bellis @ Aug 12 2019, 11:02 PM) Bad tranny ground. Thank you! I would not have checked that. Will check tonight. |
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| HerdofCrickets |
Aug 13 2019, 11:12 AM
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#7
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Member Group: Members Posts: 68 Joined: 23-September 16 From: Overland Park, KS Member No.: 20,423 Region Association: None |
QUOTE(Mike Bellis @ Aug 12 2019, 11:02 PM) Bad tranny ground. Would a bad/poor tranny ground also cause the red 'charging system error' light on the dash to light up? |
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| Chi-town |
Aug 13 2019, 12:31 PM
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#8
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Senior Member Group: Members Posts: 850 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
Yes as the alternator is grounded to the engine, not the chassis so you need the strap
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| HerdofCrickets |
Aug 13 2019, 01:39 PM
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#9
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Member Group: Members Posts: 68 Joined: 23-September 16 From: Overland Park, KS Member No.: 20,423 Region Association: None |
QUOTE(Chi-town @ Aug 13 2019, 01:31 PM) Yes as the alternator is grounded to the engine, not the chassis so you need the strap I ran home over lunch and checked; I did re-attach the strap under the car by the transmission ... I'll take it off tonight, clean it up, and re-attach. |
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