 Optional Starter Relay, Add a relay to protect the ignition switch |
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| Artfrombama |
 Feb 23 2024, 03:01 PM
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Member  Group: Members Posts: 51 Joined: 21-January 24 From: Alabama Member No.: 27,870 Region Association: South East States  |
On a previous 914 I had many years ago I experienced a "no crank" condition that I traced back to my ignition switch. It seems that in the start circuit on the switch, when the key is released a tiny "backfeed" of current from the starter solenoid arcs across the terminals on the ignition switch, and over time damages the contacts.
After a little research I determined there are two ways to stop this "current backfeed", one is to install a diode to ground in the starter wire, another (which I did) was to install a simple 5 pin relay.   Hope this is of some help, please disregard or delete if this has been discussed before. |
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| GregAmy |
Feb 23 2024, 03:09 PM
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Advanced Member Group: Members Posts: 2,311 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States 
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| Artfrombama |
Feb 23 2024, 03:13 PM
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Member Group: Members Posts: 51 Joined: 21-January 24 From: Alabama Member No.: 27,870 Region Association: South East States |
QUOTE(GregAmy @ Feb 23 2024, 03:09 PM)  Whoosh, right over my head (IMG:style_emoticons/default/rolleyes.gif) |
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| ClayPerrine |
Feb 23 2024, 04:11 PM
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Life's been good to me so far..... Group: Admin Posts: 15,503 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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QUOTE(Artfrombama @ Feb 23 2024, 03:13 PM) QUOTE(GregAmy @ Feb 23 2024, 03:09 PM) Whoosh, right over my head (IMG:style_emoticons/default/rolleyes.gif) It's not you. The topic of adding that relay to the starter circuit has been an ongoing point of contention for years on this forum. Some say it is necessary. Some say it is not. Some say put in a Ford starter relay. Some say to use a gear drive starter. So go back and read some of the links in that search you were sent. And welcome to 914World. (IMG:style_emoticons/default/welcome.png) |
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| 914Mike |
 Feb 23 2024, 04:23 PM
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Member Group: Members Posts: 330 Joined: 27-January 03 From: San Jose, CA Member No.: 198 |
QUOTE(ClayPerrine @ Feb 23 2024, 03:11 PM) ... The topic of adding that relay to the starter circuit has been an ongoing point of contention for years on this forum. Some say it is necessary. Some say it is not. Some say put in a Ford starter relay. Some say to use a gear drive starter. So go back and read some of the links in that search you were sent. And welcome to 914World. (IMG:style_emoticons/default/welcome.png) And yet no modern car is without a relay and most have a diode or similar as well, which protects the relay contacts. Even the relay coil gets a diode to minimize the wear on the key switch. Common practice that began in the electronics industry and then moved to the automotive. |
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Posts in this topic
Artfrombama Optional Starter Relay Feb 23 2024, 03:01 PM
GregAmy A guy goes to prison for the first time, gets walk... Feb 23 2024, 03:50 PM emerygt350 Takes ten minutes to put in the ford solenoid with... Feb 23 2024, 08:07 PM
StarBear
Takes ten minutes to put in the ford solenoid wit... Feb 24 2024, 08:36 AM bdstone914 I sold a rebuilt starter to a guy about a year ago... Feb 23 2024, 09:32 PM Superhawk996
I sold a rebuilt starter to a guy about a year ag... Feb 24 2024, 01:42 AM Artfrombama Someone tell me why the Ford solenoid (relay) is s... Feb 23 2024, 10:46 PM Superhawk996 42 :stir:
Typical Bosch aftermarket automotive r... Feb 24 2024, 12:40 AM Artfrombama
42 :stir:
Typical Bosch aftermarket automotive ... Feb 24 2024, 10:56 AM dr914@autoatlanta.com I have a solenoid in my Ford Feb 24 2024, 11:20 AM StratPlayer
I have a solenoid in my Ford
Life is good huh ... Feb 24 2024, 11:28 AM windforfun
I have a solenoid in my Ford
Gorgeous. Stunnin... Feb 24 2024, 05:52 PM Front yard mechanic Why is there no rock behind the back tire? Feb 24 2024, 11:30 AM 87m491
Why is there no rock behind the back tire?
Not ... Feb 24 2024, 02:16 PM Montreal914 347... Diode explanation on YouTube.
https://www... Feb 24 2024, 11:39 AM Superhawk996
347... Diode explanation on YouTube.
89
Nic... Feb 24 2024, 12:03 PM windforfun
[quote name='Montreal914' post='3130467' date='Fe... Feb 24 2024, 05:57 PM |
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