Can you confirm that without headlight fuse 3 in place the indicators (and hazards) work with and without the engine running and fuse 1 stays intact?

If the answer to the above is yes, then just to make double sure, replace fuse 3 and try the indicators again with and without the engine running to see if fuse 1 blows again. If it does, then we�ve narrowed down the issue to a common short between the headlight and indicator circuit which will have to be found.

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