Where is the ignition module located at on a 1991

Ignition control module, is not the same as an ECM, it is termed an "igniter" and is located in the distributor, as part of the reluctor wheel pickup and ignition module.
Generally the entire distributor is replaced as a unit for ease and typical distributor bearing issues.

Could be a weak coil or bad ignition module located in the distributor. I would replace the coil if you have not ever done so then the ignition module. The coils last about 150k miles and then can go anytime after that. I've owned four 90's Hondas and they have all had this problem. If neither of those things work then you may have a bad distributor.

It's located inside the distributor. You'll have to remove the dist. cap and the metal plate below, to gain access to remove the ignition module.

It's located inside the piece of taillight that's mounted on the drivers side trunk lid.

there is no relay. test the coil circuit by turning the key on and momentarily grounding the negative terminal to see if the coil will release a spark. If yes, suspect your ignition module is bad. If no, suspect your ignition switch or wire is bad.

Ignition control module! It is located inside the distributor. I have a 1991 honda accord and honda had a recall on the control module. get your vin # nand call your local honda dealership and see if '99 had a recall too they will replace it free, if not mine cost $60

Tried replacing the ignition module with two different ones from a salvage yard. (Most of the distributors in the salvage yard were either missing completely or the ignition module had been removed - must be a very common problem.) Neither one worked.

Purchased a used complete distributor assembly w/warrantee and replaced the one that did not work. Car started immediately.

Suggestion: If one cannot wait for delivery of a new distributor as I could not, (I located one on line for $126.00 w/warrantee) purchase one from a salvage yard w/warrantee, then get a new one if you are going to be concerned about the longevity of the replacement distributor.

blown head gasket and a defective ignition module

there is a main relay located under the drivers side dash, you have to first remove the cruise control module to view this relay

91 Honda Accord has 2 separate tail lights on each side(total of 4 pieces). My problem stemmed from a faulty control module on the right hand side(passenger side). The module in question is located inside the smaller of the 2 tail light sections. In order to change the module you have to remove the tail light. There are 4 nuts holding in the taillight section and 2 phillips head screws holding the module in. The module on this side is 6 pin plug in. The one on the drivers side is a 5 pin plug in. Whole effort takes about 45 minutes. It is strictly plug and play.