• Welcome to For E Bodies Only !

    We are a community of Plymouth Cuda and Dodge Challenger owners. Join now! Its Free!

Wiring Issue

Joined
Jun 19, 2021
Messages
23
Reaction score
4
Location
Claxton Georgia
Putting interior back together on my 72 challenger rallye . Dash installed and power everywhere but nothing works ? Any help with ground issues or any other thoughts ? Only thing I do have are headlights ! Have checked dash light bulbs, fuses etc. all are good ! Help !
 
Joined
Jun 19, 2021
Messages
23
Reaction score
4
Location
Claxton Georgia
Yesir , power to cluster and everywhere under dash ! Everyone says it has to be a ground problem but were not sure where the ground comes from for the inside and rear? we don.t have anything on the rear either ? no taillights ect. ? I don.t have any grounds under hood other than neg. battery to engine and small lead from neg. cable to body ???
 

70chall440

Well-Known Member
Joined
Dec 11, 2010
Messages
1,246
Reaction score
928
Location
Western Washington
The ground for the dash cluster comes from the dash frame which comes by contact with the body (bolts/screws across the top and the 2 side 1/4-20 bolts). Run a 10g wire from some place on the dash frame to the fire wall ensuring that you have no paint on either end.
 

Challenger RTA

Well-Known Member
Joined
Oct 28, 2018
Messages
812
Reaction score
321
Location
PA Flood city
Headlight power comes from splice one,behind cluster.and it should complete the curicit througth ground wire in front of battery. With headlights on remove ground. That would be the 2 smaller wires. light should go off.if not you have other problems. bottom of fuse box connection 1 reads ACC other reads BATT,see if there hot. Power everywhere a little vauge. connect a wire (jumper cables negitive only) to battery ground and use it to probe for power.

20211213_150353.jpg
 
Last edited:

themechanic

Well-Known Member
Joined
Aug 16, 2019
Messages
115
Reaction score
38
Location
Moore, OK
Battery ground to radiator support and engine, engine ground to firewall, dash ground to A-pillars and each separate screw clip needs bare metal under them as it was from the factory.
 

Attachments

  • dash.jpg
    dash.jpg
    582.1 KB · Views: 52

EV2RTSE

Well-Known Member
Joined
Dec 13, 2013
Messages
141
Reaction score
62
This screw is a critical ground, especially for the wipers.
 

Attachments

  • ground.jpg
    ground.jpg
    52.1 KB · Views: 66
Joined
Jun 19, 2021
Messages
23
Reaction score
4
Location
Claxton Georgia
Anyone know where I can get actual Photos of under dash wiring? We have power and ground everywhere in dash but nothing works exept headlights ? Have ground from batt to engine and body,engine to firewall dash to body? headlight indicator on dash works but lights stay on dim? Anyone know what this connecter is ? Two red going into this plug that appears to be all ground ?
 

Attachments

  • Screenshot 2021-12-19 at 10.09.57 AM.jpg
    Screenshot 2021-12-19 at 10.09.57 AM.jpg
    108.9 KB · Views: 36
Top