Pirate 4x4 banner
1 - 2 of 2 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter · #1 ·
My 71 FJ 40 has issues with the charging system. the system was checked and alternator voltage at idle was 0. After replacing the Alternator and regulator TWICE, problems continue. An alternator shop bench tested the alternator and it’s OK. The regulator is the commonly found cheap import with no labeling. Big picture, the voltage now jumps over 17 at high rpm. Also, the voltage at the fuse panel reads under 11 with the car off (perhaps confusing the regulator). See the chart below for measured voltages. I won’t be driving it with those high readings. Should I start with the regulator points calibration as detailed in other threads? Is the low voltage at the panel not significant? The regulator ground wire is good, but could the F wire be the problem? Thanks for looking
Rectangle Font Parallel Number Pattern
 

·
Registered
Joined
·
2 Posts
Discussion Starter · #2 ·
My 71 FJ 40 has issues with the charging system. the system was checked and alternator voltage at idle was 0. After replacing the Alternator and regulator TWICE, problems continue. An alternator shop bench tested the alternator and it’s OK. The regulator is the commonly found cheap import with no labeling. Big picture, the voltage now jumps over 17 at high rpm. Also, the voltage at the fuse panel reads under 11 with the car off (perhaps confusing the regulator). See the chart below for measured voltages. I won’t be driving it with those high readings. Should I start with the regulator points calibration as detailed in other threads? Is the low voltage at the panel not significant? The regulator ground wire is good, but could the F wire be the problem? Thanks for looking
View attachment 3119575
Update: cleaned all grounds. Adjusted VR to specs. Still low voltage at idle. Ignition key unit tested and losing some ohms so ordered replacement. Also suspect electronic ignition is pulling down the overall running voltage and confusing VR. only 11 volts at fuse panel. Cannot see any fusible links off battery positive or behind instrument cluster. wondering if new electric power steering soaking up power even when not driving? Moved the thick white cable from N to B terminal on alternator As well.
 
1 - 2 of 2 Posts
Top