1992 B250 AC/heater electrical problems
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From: South Carolina
1992 B250 AC/heater electrical problems
I have a 92 B250 and when I run the fan on high the RED A1 circuit wire from the ignition switch gets very hot. More so when the AC is running.
The A1 12 RD goes through the number 49 position in the bulkhead connector to the engine compartment then is spliced in at the AO splice point with an A1 20 OR wire and fusible link, then to the charging system.
If I leave the van running with AC on and fan on high the fusible link fails.
Since I haven't been able to find the replacement FL, I put a 20 gauge wire in and it will eventually melt and fail.
By running the fan on any speed other than high and keeping the AC off the temperature doesn't get high enough to fail the wire. I've thought of putting in a replaceable fuse but I'm not sure what size and that doesn't really solve the problem.
There seems to be just too much current draw but I don't know why.
Blower motor? Fan switch (I put in new one)? HVAC vacuum control switch (I replaced it)? AC resister?
Any ideas of what to do next?
The A1 12 RD goes through the number 49 position in the bulkhead connector to the engine compartment then is spliced in at the AO splice point with an A1 20 OR wire and fusible link, then to the charging system.
If I leave the van running with AC on and fan on high the fusible link fails.
Since I haven't been able to find the replacement FL, I put a 20 gauge wire in and it will eventually melt and fail.
By running the fan on any speed other than high and keeping the AC off the temperature doesn't get high enough to fail the wire. I've thought of putting in a replaceable fuse but I'm not sure what size and that doesn't really solve the problem.
There seems to be just too much current draw but I don't know why.
Blower motor? Fan switch (I put in new one)? HVAC vacuum control switch (I replaced it)? AC resister?
Any ideas of what to do next?
