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General Minitrail Talk
Tech Area
C70 electric starter issue (1980)
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<blockquote data-quote="jdeere_man" data-source="post: 162633" data-attributes="member: 10263"><p>Ok, i hope I am not reinventing the wheel here, but here is what I did to fix the issue. </p><p></p><p>First understand the issue. The starter relay gets a constant 6v positive with the key on. With the transmission in neutral, pressing the starter button completes the ground circuit, hopefully engaging the starter.</p><p></p><p>What I observed with an ohm meter this circuit still has a lot of resistance when completed. (A poor ground).</p><p></p><p>What I did was get a <a href="https://www.amazon.com/dp/B00DK899DI/ref=cm_sw_r_cp_apa_tcOczbXG9RZV3" target="_blank">6 volt relay from amazon.</a></p><p>I also recommend a <a href="https://www.amazon.com/Parts-Express-5-Pin-Relay-Socket/dp/B0002ZPUMG/ref=sr_1_17?ie=UTF8&qid=1494556137&sr=8-17&keywords=relay+harness" target="_blank">relay wiring harness </a>for installation. Any "bosch style" harness should work. Alternatively you can use female spade connectors, but the harness is just easier I think, especially with the existing lack wire length you are dealing with here.</p><p></p><p>Tap 86 (Yellow in my harness) into the keyed positive line the starter relay is on. Be sure to leave the starter relay also connected.</p><p></p><p>Disconnect starter relay ground, connect new relay in its place, 85, red in my case.</p><p></p><p>Connect starter relay wire removed above to 30, black in my case</p><p></p><p>Put a ring on 87, blue in my case, to connect to the ground of the battery or chassis.</p><p></p><p>Tape off 87a, white to prevent it from grounding.</p><p></p><p>So the starter button now completes circuit to new relay, triggering it, which completes a good ground from the battery to the starter relay through the blue/black relay 87/30 allowing the starter relay to engage.</p><p></p><p>[ATTACH]50594[/ATTACH]</p><p></p><p>quick drawing.</p><p>[ATTACH]33818[/ATTACH]</p></blockquote><p></p>
[QUOTE="jdeere_man, post: 162633, member: 10263"] Ok, i hope I am not reinventing the wheel here, but here is what I did to fix the issue. First understand the issue. The starter relay gets a constant 6v positive with the key on. With the transmission in neutral, pressing the starter button completes the ground circuit, hopefully engaging the starter. What I observed with an ohm meter this circuit still has a lot of resistance when completed. (A poor ground). What I did was get a [URL="https://www.amazon.com/dp/B00DK899DI/ref=cm_sw_r_cp_apa_tcOczbXG9RZV3"]6 volt relay from amazon.[/URL] I also recommend a [URL="https://www.amazon.com/Parts-Express-5-Pin-Relay-Socket/dp/B0002ZPUMG/ref=sr_1_17?ie=UTF8&qid=1494556137&sr=8-17&keywords=relay+harness"]relay wiring harness [/URL]for installation. Any "bosch style" harness should work. Alternatively you can use female spade connectors, but the harness is just easier I think, especially with the existing lack wire length you are dealing with here. Tap 86 (Yellow in my harness) into the keyed positive line the starter relay is on. Be sure to leave the starter relay also connected. Disconnect starter relay ground, connect new relay in its place, 85, red in my case. Connect starter relay wire removed above to 30, black in my case Put a ring on 87, blue in my case, to connect to the ground of the battery or chassis. Tape off 87a, white to prevent it from grounding. So the starter button now completes circuit to new relay, triggering it, which completes a good ground from the battery to the starter relay through the blue/black relay 87/30 allowing the starter relay to engage. [ATTACH]50594[/ATTACH] quick drawing. [ATTACH]33818.vB[/ATTACH] [/QUOTE]
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C70 electric starter issue (1980)
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