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ProMaster 2500 Base
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Section 13 (Body Control Module (BCM) - DTCS B1107-18 To B145E-01)
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DTC Troubleshooting
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B12D3-12 Horn Control - Circuit Short To Battery
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Circuit Identifiers-Horn Relay
Circuit Identifiers-Horn Relay
WARNING:
This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.
CIRCUIT IDENTIFIERS-HORN RELAY
Circuit Function
(2024-Current MY)
Horn Switch Sense
X3
Horn Relay Control
X4
Fused B+
A104
Horn Feed
X2