ArcWindsor
New Member
Hello, its been a while since I was on this forum. Its good to be back.
I want to rewire one of the ACC sockets in my car (I have 2) to be constantly hot instead of only with ACC/ON like it comes stock. I accept the battery drain risk because I won't forget to unplug something.
Background: Below is the ACC socket circuit diagram for my car. My plan is simply to jump the relay. This way, the load is still drawn from the same source as it normally is- just no switching.
Notice underdash fuse#9 (15A) supplies the sockets. I plan to modify it like the below diagram. Only one socket will be rewired to be constant, and the other one will stay with ACC/ON. I would just be jumping the relay by cutting the wire and routing it directly to fuse#9 with an add-a-circuit.
**broken link removed**
My problem is the fusing. I understand that the add-a-circuit causes a single fuse slot to turn into two in parallel, and from what I understand, fuses in parallel actually increase the total amount of current possible without blowing it. So I'm worried about overdraw.
Without modification, if the sum of the two sockets' current exceeds 15A, then it'll blow. But if I use an add-a-circuit with two 15A fuses in parallel, then the sum of the two sockets would then have to exceed 30A for the fuse to blow. This sounds unsafe to me. If each socket rides at, let's say, 14.5A, then I'm going to have 29A running without either fuse blowing, right? I'm not an expert, so if anything is wrong I say, then please correct me.
Since each separate socket's line will be fused okay itself, I'm mostly worried about the line between the 15A and 40A fuses. Am I protected with two 15A fuses in the add-a-circuit? Or should I use two 7.5A fuses in the add-a-circuit? Using the 7.5A fuses will decrease the max capacity of the sockets, but who actually draws that much from the ACC socket with a phone, ipod, or aftermarket GPS anyway?
Thanks for your consideration.
I want to rewire one of the ACC sockets in my car (I have 2) to be constantly hot instead of only with ACC/ON like it comes stock. I accept the battery drain risk because I won't forget to unplug something.
Background: Below is the ACC socket circuit diagram for my car. My plan is simply to jump the relay. This way, the load is still drawn from the same source as it normally is- just no switching.
Notice underdash fuse#9 (15A) supplies the sockets. I plan to modify it like the below diagram. Only one socket will be rewired to be constant, and the other one will stay with ACC/ON. I would just be jumping the relay by cutting the wire and routing it directly to fuse#9 with an add-a-circuit.
**broken link removed**
My problem is the fusing. I understand that the add-a-circuit causes a single fuse slot to turn into two in parallel, and from what I understand, fuses in parallel actually increase the total amount of current possible without blowing it. So I'm worried about overdraw.
Without modification, if the sum of the two sockets' current exceeds 15A, then it'll blow. But if I use an add-a-circuit with two 15A fuses in parallel, then the sum of the two sockets would then have to exceed 30A for the fuse to blow. This sounds unsafe to me. If each socket rides at, let's say, 14.5A, then I'm going to have 29A running without either fuse blowing, right? I'm not an expert, so if anything is wrong I say, then please correct me.
Since each separate socket's line will be fused okay itself, I'm mostly worried about the line between the 15A and 40A fuses. Am I protected with two 15A fuses in the add-a-circuit? Or should I use two 7.5A fuses in the add-a-circuit? Using the 7.5A fuses will decrease the max capacity of the sockets, but who actually draws that much from the ACC socket with a phone, ipod, or aftermarket GPS anyway?
Thanks for your consideration.
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