{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"AC","section_name":"Air Conditioning","page":58,"pages_in_section":111,"title":"Heater Relay Circuit","section_header":"Air Conditioning System — Troubleshooting","ocr_text":"AC–58\nAIR CONDITIONING SYSTEM – TROUBLESHOOTING\n\nHeater Relay Circuit\n\nCIRCUIT DESCRIPTION\n\nThe heater relay is switched on by signals from the A/C amplifier and switches power to the blower motor.\n\nWIRING DIAGRAM\n\nB\nFrom HTR Fuse\nA/C Amplifier\nR-L\n2\n2  2\nHTR\n4  1    5\nALT\n2    3\nL-W  3  L-W  5  L-W  16\n2         IB2       IF1      A14  HR\nL-R  Blower Motor\n2         Control Relay\n1  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