My friend asked me to take a look at his neighbors radio. They just had a new engine in their older cavalier (i believe its a cavalier) which was done professionally and now there after market Sanyo doesnt work. So they pulled it out and hooked it back up. They had the ground connected through the ground harness and directly to the battery with 14 gauge wire i think. When they did this it started to melt both ground wires. When i got there i checked to see if they had power to the memory and acc wire with a test light and they did. I also checked they fuses and the memory fuse was blown. I put in another one and it blew right away. So now im stumped. I told them to try and ground it to the floor panel and then put another fuse in to see if it works and if not then i dotn kno what. If I cant figure it out there going to go to the place that put the engine in and have them fix the problem. Thanks for the help.
Replies (5)
ryan on 06/3/2004 11:18:51
^ BUMP
ryan on 06/4/2004 08:25:16
Swez, Ttocs, anyone have an idea on the what the problem can be?
swez on 06/4/2004 20:47:12
This HU was in the car before the engine swap was done and it worked fine? Then, the engine was replaced and the Sanyo did not work. You tested the MEM & ACC for power and they had power, but MEM fuse was blowing and factory ground wires were melting... did I get that summary right?
It sounds like they need to do a bench test on the SANYO HU to determine if tf is still working properly. MEM fuse should be only a few amps (1-3A) at most and get +12 volts all the time. If that fuse is blowing, either have the wrong wire fused (what color is that MEM?) or something has gone south in the HU.
Also, melting grounds wires means too much current is flowing through them. That usually indicates mis-wiring or a near shorted condition that is drawing way too much current. Grounding the HU to floor pan with same gage wire as power lead (#12-14) should cure that ill.
The main power line from ACC/IGN to HU (usually RED) should be fused as well. This fuse is usually 7.5 - 15A, depending on the amp power inside the HU. I cannot see why an engine swap should have any major effect on the HU. If any wiring harness in the dash were changed as well, then that would make sense.
In short, this HU may need a bench check first. If it works on the bench... new wiring may be needed or the wrong wires in dash were used.
Swez
ttocs on 06/4/2004 23:27:12
it sounds like the radio has a short in it if it melted the wires when hooked up both times, but what he said....
ryan on 06/5/2004 17:09:31
Yea you got it right swez. I'll let them know that they need to get the HU bench checked. Thanks guys.
Replies (5)
ryan on 06/3/2004 11:18:51
^ BUMP
ryan on 06/4/2004 08:25:16
Swez, Ttocs, anyone have an idea on the what the problem can be?
swez on 06/4/2004 20:47:12
This HU was in the car before the engine swap was done and it worked fine? Then, the engine was replaced and the Sanyo did not work. You tested the MEM & ACC for power and they had power, but MEM fuse was blowing and factory ground wires were melting... did I get that summary right?
It sounds like they need to do a bench test on the SANYO HU to determine if tf is still working properly. MEM fuse should be only a few amps (1-3A) at most and get +12 volts all the time. If that fuse is blowing, either have the wrong wire fused (what color is that MEM?) or something has gone south in the HU.
Also, melting grounds wires means too much current is flowing through them. That usually indicates mis-wiring or a near shorted condition that is drawing way too much current. Grounding the HU to floor pan with same gage wire as power lead (#12-14) should cure that ill.
The main power line from ACC/IGN to HU (usually RED) should be fused as well. This fuse is usually 7.5 - 15A, depending on the amp power inside the HU. I cannot see why an engine swap should have any major effect on the HU. If any wiring harness in the dash were changed as well, then that would make sense.
In short, this HU may need a bench check first. If it works on the bench... new wiring may be needed or the wrong wires in dash were used.
Swez
ttocs on 06/4/2004 23:27:12
it sounds like the radio has a short in it if it melted the wires when hooked up both times, but what he said....
ryan on 06/5/2004 17:09:31
Yea you got it right swez. I'll let them know that they need to get the HU bench checked. Thanks guys.
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