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Mercury Grand Marquis 2004 ECU
I have installed a new ECU from a reputable supplier in my Mercury Grand Marquis 2004. The dash goes blank when key is turned to start. Car would staret half an hour previously with old ECU, battery is new. Any ideas?
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Answers
2023 Mercedes EQE 350 4Matic / 2022 Ram 1500 Bighorn, Built to Serve
Sometimes larger locksmiths have the equipment to program the keys as well.
2023 Mercedes EQE 350 4Matic / 2022 Ram 1500 Bighorn, Built to Serve