My 1972 Challenger 4speed when put in reverse the signal lights, radio, and tack fuse blows 20amp

SOURCE: no brake lights blows fuse every time

there is most likely a short in the wires have you put a tow package on it if so did you splice in to the lines check all wires and see if they are burnt any were most likely short

Bruce Bracey

• 1000 Answers
• Posted on Mar 26, 2009

SOURCE: fuse blows when shift in reverse

Am I correct, the turn signal fuse is blowing when you put the manual shifter in reverse?
Let me know.
Regards

ZJ Limited

• 17989 Answers
• Posted on Sep 02, 2009

SOURCE: large 20amp fuse keeps blowing

Change the fuse for the correct size AMP.



More details about Power Center Distribution, check the Section 8W Wiring Diagrams

Good luck.

SOURCE: reverse light fuse blows when put into reverse

Unfortunately, many possibilities. If you have time, start by removing both reverse lamp sockets from light assembly(and keep from touching any metal), remove bulbs from sockets, CAREFULLY INSPECT sockets and wires. New fuse of correct rating. Turn key on and try again in reverse.
Fuse still blows: Next place to look is transmission reverse electrical switch and wiring as far as you can trace looking for burned/stripped wires near transmission and wires by sockets
Fuse doesn't blow: Turn key off and install one lamp in socket at a time. DO NOT install sockets into fixture at this time. Test. Remove first lamp to check second. If still O.K., each socket back into fixture(one at a time same as before)and test. Most common problems: Sockets contaminated, wires shorting at sockets, bulbs installed incorrectly shorting to ground.

SOURCE: my signal lights keep blowing a fuse

Replace the signal Relay thats your problem.