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Home >> Ford >> 2023 >> F-150 Lightning Pro >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting Diagnosis & Testing (Parking Lamps - STOPLAMPS) >> Diagnosis And Testing >> Stoplamps >> Global Customer Symptom Code (GCSC) Chart

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

Symptom Action
Lighting/Glass/Vision > Exterior Lighting > Stop > Inoperative GO to Pinpoint Test A 
Lighting/Glass/Vision > Exterior Lighting > Stop > Inoperative GO to Pinpoint Test B 
Lighting/Glass/Vision > Exterior Lighting > Stop > Stays On GO to Pinpoint Test C 
Lighting/Glass/Vision > Exterior Lighting > Center High Mount Stop (CHMSL) > Inoperative GO to Pinpoint Test A 
Lighting/Glass/Vision > Exterior Lighting > Center High Mount Stop (CHMSL) > Inoperative GO to Pinpoint Test B 
Lighting/Glass/Vision > Exterior Lighting > Center High Mount Stop (CHMSL) > Stays On GO to Pinpoint Test C 
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