# T3 code 51 fix wanted **URL:** \ **Category:** GEM Forum\ **Created:** [March 5, 2024, 6:22pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554 "2024-03-05T18:22:05Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [March 5, 2024, 6:22pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/1 "2024-03-05T18:22:05Z")
Can anybody fix a 51 code? Cant stand FSIP service charge. [rodneyadiehl@aol.com](mailto:rodneyadiehl@aol.com) Trade motor work or parts for quick repair Rodney ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [March 5, 2024, 6:37pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/2 "2024-03-05T18:37:08Z")
I asked Byron. Pin 1 needs battery voltage before key on. Sorry, thinking t1 ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [March 5, 2024, 8:26pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/3 "2024-03-05T20:26:17Z")
doesnt until i turn key on In a message dated 3/5/2024 1:47:11 PM Eastern Standard Time, [notifications@electricforum.discoursemail.com](mailto:notifications@electricforum.discoursemail.com) writes: ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [March 5, 2024, 8:45pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/4 "2024-03-05T20:45:09Z")
That was before I knew this was a t3. T1/T2 gets power on P1 and P2 in sequence. T3 and up gets powered up at same time. ---
**Author:** ![grantwest](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/grantwest/32/15_2.png) [@grantwest](https://community.electricforum.com/u/grantwest)\ **Post date:** [March 6, 2024, 1:27am UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/5 "2024-03-06T01:27:51Z")
Rodney I’m surprised your playing with that T-3 I thought most people hated that T-3 ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [March 6, 2024, 12:54pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/6 "2024-03-06T12:54:09Z")
It is my belief that a t3 pre-charges via p17 through coil of “L”. Byron tells me that “L” may get B+ from key circuit. In that case, I’m confused as to how precharge occurs. It may be the delay, waiting for start switch, that gives time to precharge. Be sure, the start switch is not active (low), before p1 goes high (key). Although that has it’s own fault code. ![Screenshot_20240306_064538_Drive](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/a/a809d01a20a6039d3380f903c7ba57ce43773617.jpeg) Ps, Try connecting an “always on” B+ source to coil. Measure controller B+ terminal. It should rise to near 72v, showing capacitors charging. Test capacitor circuit for shorts circuits. Connecting B+ to controller B+ through external resistor should show voltage rising on B+. Use coil of a spare main contactor, low value resistor (100s ohm), or large 120v bulb, to limit current. ---
**Author:** ![AssyRequired](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/assyrequired/32/7621_2.png) [@AssyRequired](https://community.electricforum.com/u/AssyRequired)\ **Post date:** [March 6, 2024, 3:18pm UTC](https://community.electricforum.com/t/t3-code-51-fix-wanted/27554/7 "2024-03-06T15:18:53Z")
From that nice color 2005 wire diagram, p1, p2, and MC goes to B+ at KeyON. ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/a/a482669b2afa3166da98ad8db897d5587083cad6.png) * * * * * * Since I have found drafting errors before I thought I’d check the 2013 diagram. It is much the same except wire color change to orange. ![image](https://canada1.discourse-cdn.com/flex030/uploads/electricforum/original/2X/b/bf66e7fddcaa5fc0a05411e5adb12f45eca4d18f.jpeg)