Ground Problem - Stumped
Was getting ready for a weekend trip up the coast. When I went to test the electrical between my GMC truck and Forest River Roo trailer (7-pin), the front running lights on the trailer illuminated, b...
Forum Discussion
Taking your word that;
A.No wireing has been done since lights worked properly.
AND
B.You made good contact between all wire bundels you spoke of.
Ground test method #1
With 7 way pluged in, park lights on,either turn signal on and vom set to dc volt,black probe to tv frame and red to trailer frame. If any voltage is detected,ground is weak between tv and trailer.
Ground test method #2
7 way pluged in,no lights on and vom set to ohm/R,either probe to good ground on tv and other probe to trailer. Anything above fraction of ohm reading is weak ground between tv and trailer.
If either or both tests above show weak ground,test as follows.
No lights on and 7 way unpluged. Test between #1 in tv 7 way and tv frame. Anything above fraction of ohn means #1 has poor contact to tv ground.
Same test as above between trailer 7 way #1 to trailer frame.
If any test above fails and you are unable to find the bad connection,post back and somone will walk you through locating the trouble spot.
A.No wireing has been done since lights worked properly.
AND
B.You made good contact between all wire bundels you spoke of.
Ground test method #1
With 7 way pluged in, park lights on,either turn signal on and vom set to dc volt,black probe to tv frame and red to trailer frame. If any voltage is detected,ground is weak between tv and trailer.
Ground test method #2
7 way pluged in,no lights on and vom set to ohm/R,either probe to good ground on tv and other probe to trailer. Anything above fraction of ohm reading is weak ground between tv and trailer.
If either or both tests above show weak ground,test as follows.
No lights on and 7 way unpluged. Test between #1 in tv 7 way and tv frame. Anything above fraction of ohn means #1 has poor contact to tv ground.
Same test as above between trailer 7 way #1 to trailer frame.
If any test above fails and you are unable to find the bad connection,post back and somone will walk you through locating the trouble spot.
