Hi garanito. Welcome to AAC!
The circuit in my posts above is for the situation where the actual sender resistance range is lower than the required emulated range. Your problem is the reverse, requiring a different circuit. The one below should do what you want and has been tailored to suit your sender :-
D1 protects agains reverse polarity. D2-4 and the capacitors protect against voltage transients.
I'm also attaching the LTspice simulation asc file.
The circuit in my posts above is for the situation where the actual sender resistance range is lower than the required emulated range. Your problem is the reverse, requiring a different circuit. The one below should do what you want and has been tailored to suit your sender :-
D1 protects agains reverse polarity. D2-4 and the capacitors protect against voltage transients.
I'm also attaching the LTspice simulation asc file.
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