700R4 LockUp Troubleshooting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sick472 · 09-17-2021, 10:24 AM

My guy is concerned that I may not be sending enough power (volts or amps) to pin "A" and has suggested that I run a new 12 volt wire (fused at 10 amps) from my battery to pin "A" and then run a switched ground wire from pin "D" to a good ground. This would serve as a test to prove that the transmission's electrical components are good (or not) by eliminating any possible shortcomings of my wiring that is external to the truck. The ground switch would be closed after entering 3rd gear for observation of the lock-up function through 4th gear.

Does that sound right?

09-17-2021, 10:24 AM	#19
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,131	Re: 700R4 LockUp Troubleshooting My guy is concerned that I may not be sending enough power (volts or amps) to pin "A" and has suggested that I run a new 12 volt wire (fused at 10 amps) from my battery to pin "A" and then run a switched ground wire from pin "D" to a good ground. This would serve as a test to prove that the transmission's electrical components are good (or not) by eliminating any possible shortcomings of my wiring that is external to the truck. The ground switch would be closed after entering 3rd gear for observation of the lock-up function through 4th gear. Does that sound right? __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20

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